Okay, I've written this post four or five times (every few weeks) and each time I delete it before I post because... I think I get cold feet *speaking of which Salamon2 covers his cold numb toes with a blanket*.
Anyway I'd like to for a moment explain what this poll says about the different Generational interactions here on Portkey as well as possibly give generational reactions to Harry Potter and give another explanation (beyond the obvious "we were all like the story") as to why different generations seem caught up with Harry Potter in general. So if this goes slightly:

please forgive me, but I'm trying to give a reference for my analysis below so everyone can understand it.
First let me quickly explain the basics of Generational Theory, as according to Neil Howe and William Strauss in their 1991 book: Generations.
Mr. Howe and Mr. Strauss began looking through American history (especially history of pop. culture) and began to notice trends through it (it's very easy to see trends in history, but I digress).
They came up with this theory that there are four different types of archetype generations that cycle through history and the generations are born for roughly periods of 20 years. Not only that, but there are four different periods of "history" that a culture/society goes through as the order of these generations shifts and they age. The period from which the first archetype of these four generational archetypes until that archetype is repeated is usually a 70 - 80 year period and this period is called a "saeculum". Within the saeculum there are four smaller little historical periods that are created by the different interactions of the different generations as well as the absence of one generation from influencing popular culture.
The archetypesIdealists - A generation that is greatly concerned with the morals of society. Most often they are split generations and are extremely divided and uncompromising of their ideals. As children they were given time to be children and were valued. They were taught by their parents to look within themselves to solve problems and find answers. As teenagers/young adults they begin an Awakening and see the moral faults in society. These generations are very religious or hold onto their more secularized moral views as strong as religious faith. As parents they are terrified at what society has become and increasingly edit/censor things for their children, and implant their beliefs into their children.
Nomads - A generation that has two main concerns: living on the edge of life/getting a thrill out of life and surviving against all odds. These generations tend to be mostly conservative. As children they were "abandoned, neglected, and had to deal with 'devil/bad child' stereotypes". They weren't always physically abandoned and such, it could be they were emotionally abandoned and such, as the recent Nomads were raised: they just came home from school to an empty house and had to deal with a giant wave in divorced parents. Usually as teenagers/young adults they become intensely focused on the fringes of society as they seek to escape the emotionally neglectful society they've been born into where adults care more about themselves and their problems than their children. This causes this generation to have the least regard for parental authority towards them. This also tends to turn them into snarky sarcastic pessimists, always doubtful that things will ever get any better. They especially are drawn to the "thrill" of gangster life, and the escapist opportunities that drugs/alcohol provide are taken frequently. When they finally settle down as parents they are extremely smothering parents who take the censorship and conformity to parents trend of the Idealist generation too far when raising their children. Through the crisis they are often the grand leaders everyone turns to and expects to pull them through it all. Through the crisis their learned survivalist qualities from their abandonment from childhood are put to good use in getting the culture/nation to survive the crisis.
Civics - A generation that is focused on the world at large, are very technology adept/skilled, and when they band together are an unstoppable force. As a generation they are extremely energized and positive with a "can-do" attitude. On the negative side, they tend to be more willing to sacrifice individual liberties for the greater good, and can be very clannish. This clannish quality however will go away if the outsiders are able to "marry into" the norm. If they are manipulated by a power hungry Nomad, they can justify doing a lot of horrible things for a "better world". They are notorious for not asking "why" and sometimes not asking any questions at all. After all it interferes with getting things done, which is what they believe is most paramount--that it's time to get things done. They leave the questions to be answered by their parents, who instilled their beliefs into them. Whatever age group this generation is in, the government will focus on changing/improving that aspect of society--education when they're kids, worker's benefits and veteran's benefits when adults, retirement and old age care when elderly. As children, they mostly were children of Idealists and a few early Nomads. They were spoiled by over-indulging helicopter parents who fought their battles for them. These children were often left them in the care of Nomad babysitters/nannies as their parents went out to champion their own causes. This early interaction with Nomads in leadership positions secures the almost unquestioned idolization and admiration of the Nomads in the Civics' hearts, which can be a good or a bad thing when the Nomads become the leaders of the country. As parents, they take the pressures off their children and give them times to "just be kids" and "find themselves". Civic generations work together to tear down old orders and build new ones in the image of the ideals that their parents envisioned.
Adaptives - A generation that is focused on compromise, conformity, and improving the world they live in. These generations see the faults in the world that the Civics made and are constantly trying to fix the holes that the new Idealists shoot into it. They hope to find a way of satisfying both the old Civics and the young Idealists and are often left feeling stuck in the middle, seeing both sides of the coin and unable to bring either to a full compromise that would do more good than putting a band-aide on a hole in a dam. They try their best though, and find a better way of pointing out societal flaws through comedy. The best comedians that are funny without having to attack one group or another, but just are plain funny, usually come from Adaptive generations. As children they were smothered and told to follow the Civics' example. They have great respect for mom and dad, and do what they're told to do. As teenagers, they are the most naive and are very positive about the future. When they grow up and see problems in society that they hadn't before they try to resolve them first without causing much fuss. However when the next idealist generation comes along, their job of doing so grows increasingly harder. As parents these people continued to follow the norms that their parents laid down, but find that there is something wrong with them and that they don't quite work. They also become focused more on fixing the problems of the Civic generation that those problems begin to seep into their homes and they often inadvertently "abandon" their children in order to fix/deal with the societal issues. Although sometimes tensions over the traditions that had been handed down to them causes actual emotional/physical abandonment/neglect. As leaders they are so focused on compromising and fixing mistakes that everyone can live with that their solutions are weak and often ineffectual. By trying to please everyone, they end up pleasing no one.
The history periodsHigh - society has/is recovering from the effects of the crisis. This is a time when older "grandfather-like" or "war-hero" figures tend to be presidents. Society/culture begins to reimagine itself and redefine itself as well as rebuild itself. A generation of old idealists die off and their children give birth to another generation of idealists.
Awakening - society is thrown into upheaval as the rebuilt society is found to have little or no moral concerns. The new society seems empty and like a hollow shell. Problems are found with the new society and are protested against. These problems however are not fully resolved and sometimes go ignored as the people protesting them become split in their opinions and realize that they're "out numbered" or so to speak. Usually a great religious movement occurs during this time period.
Unraveling - society attempts to return to the culture of the High, however the problems that were pointed out and unresolved (or were badly/temporarily resolved) begin to fester and start to slowly eat away at the society. Also people are no longer as "innocent" as they were during the High, and culture seems to undergo a long/slow steady rate of perversion, especially in young adult/teenage culture where gangster life, escapism, and such things all of sudden become the focused activities. Leaders are ineffective and morally deficient and continue to grow worse as the Unraveling continues.
Crisis - the problems erupt onto the society, and it can no longer live in denial of the situation its in. However which dream/vision of the future should be chosen to "redefine" society? The splits and diversions that emerged in the Awakening reawaken and threaten for the longest time to tear apart the country/culture at the seams. For a while society just seems to get worse, but then all of sudden, out of practically nowhere it seems, a glimmer of hope appears that people (most of whom protested in the Awakening, and their children who have been brought up to value their ideas) choose to work towards solving these problems.
The currently living Generations and their archetypes:Missionary Generation (last remaining few just died recently) -
Idealist - cultural contributions: FDR, Herbert Hoover, 1890s & 1900s culture, worker's strikes, Socialist movement, Women's Suffrage, Third Great Awakening, Spanish-American War, War on Fascism aka WWII, Prohibition, Henry Ford
Lost Generation (a handful few centenarians are alive, the rest are gone) -
Nomad - cultural contributions: Jazz Music, WWI Veterans, Flappers & Dappers, Roaring 20's youth culture, Fitzgerald, Hemingway, 1950s adult culture, Eisenhower, Truman, McArthur, Patten
G.I. Generation (are the oldest folks in the nursing home, or are being buried) -
Civic - cultural contributions: WWII Veterans, 1930s & 1940s youth culture, nerd-like love/faith in technology, CCC workers, Disney, JFK, LBJ, Carter, Nixon, Reagan, Bush Sr., Ford, Bob and Elizabeth Dole, Leonard Bernstein, Lillian Hellman
Silent Generation (are the folks they make fun of in DTV ads, they are the younger set in the nursing home or are just entering it) -
Adaptive - cultural contributions: Shirley Temple, Ralph Nader, Rod Sterling, Sandra Day O'Connor, Barbara Streisand, Joe Liberman, McCain, 1950s youth culture
Boomer Generation (between mid-life and elderhood) -
Idealists - cultural contributions: Vietnam protests, Consciousness Revolution, Fourth Great Awakening aka the Jesus Movement, Feminist Movement, 1960s & 1970s youth culture, hippies, yuppies, Clinton, Bush Jr., War on Drugs, War on Terror
Generation X (30s - Midlife) -
Nomad - cultural contributions: Rap music, Indie culture, 1980s and 1990s youth culture, punk, goth, Atari, old school video games, Google, Buffy the Vampire Slayer, Barack Obama (although technically he's a Gen. Jones)
Millennial Generation (10s - 20s) -
Civic - cultural contributions: they haven't culturally contributed a lot beyond Facebook and MySpace. However a lot has been attributed towards them. They are stereotyped at the moment as those upbeat positive youth with iPods who can't seem to get off of the computer/internet. Nerds are suddenly acceptable and sexy! Current youth culture. Those who Harry Potter was marketed towards.
Homeland/Neo-Disney/New Silent Generation (being born - 10s) -
Adaptive - Interactions with this generation is very limited, and knowing their generational personality is even more limited because they are still forming it. However "cute" anecdotes seem to appear/crop up everywhere. Such as: those cute little children who are so self-censoring that whenever they hear rap music or music with "bad words" in it they yell to turn it off and cover their ears.
Birth Years (provided by Strauss and Howe, who did not use birth rates to categorize generations, but trends in Pop. culture):
1860 - 1881 - Missionary
1882 - 1900 - Lost
1901 - 1923 - G.I.
1924 - 1942 - Silent
1943 - 1960 - Boomer (this generation is SO divided it has a sub-Generation between it and Gen. X called Generation Jones: 1956 - 1964; who want to have little to do/no connections with the rest of the Boomers)
1961 - 1981 - X
1982 - ~2001 - Millennial
~2002 - ~2020 - Homeland
Howe and Strauss also say they find similar patterns of Generational interactions in other nations, and that America's Generational interactions have their roots in Medieval England. Also noticing the other nations, they say that most of the world has fallen "in sync" with each other (America seemingly 5 or so years ahead of Europe because recovery from WWII took less time, although Bush Jr. might have slowed us down to be equal with Europe now). Most of the world is just starting to enter the Crisis. Russia is a full historical period ahead of the rest of the world, and is moving into it's High. The Arab world and a few South American Countries are moving into Awakenings, while a couple of African Countries are entering Unravelings.
Now since this book has been published, marketing companies have been exploiting this, and using Generational theory especially in advertising, and from how this poll and others like it elsewhere seem to be turning out exactly how they advertised Harry Potter: for the Millennial Generation.
The interesting thing though that they didn't expect was for the older kids, young adults, and some of the parents to get hooked on HP as well. Here's my explanation using the above theory to help explain the why of why "they like it".
Now looking at the descriptions of the different Generational archetypes, which one most resembles Harry's childhood?
If you answered Nomad, you can give yourself a slap on the back of congratulations.
Harry was emotionally and physically abandoned and neglected by the Silent Generation-esque Dursleys. There's even the typical "demon/bad child" stereotype that Dudley portrays, that Harry has to deal with. He wishes to escape the horrible life he leads, and then something happens: he does. Wish fulfillment in the form of finding out he is actually a wizard, allows him to escape from an adult/muggle world that is just beginning their Unraveling (but without the use of alcohol or drugs). A Nomad Generation's fantasy come true! So really it's no surprise that Generation X latched their latch-keys onto Harry Potter--cause they experienced similar things in their childhood, and could escape with him into a seemingly more magical and "better" world than the one they were currently living in. Perhaps this explains why Hermione's parents are so "disposable". Also interesting is that Generation X, once they realized Harry's world wasn't "perfect" (as of course these cynical pessimists suspected all along), they focused on the fringe societies of Harry's world, outcasts, and others who seemed to share their opinions or seemed to have similar experiences as they did: Snape (the most popular and most Nomadic character in the book), Luna, Hermione, Neville (to a lesser extent), James & Lily, Sirius, etc.
However once in the magical world, we quickly discover that they are farther along in their Unraveling than the muggle world is, because all of the children that Harry meets are quite obviously Civic children. From the way that none of them question the authority of adults who "know better" to the way they've been indoctrinated and most firmly agree with their parent's beliefs (unlike previous generations as Andromeda Black - Ted Tonks, Sirius Black, Snape, etc. show), as Ron and Draco both brilliantly display for both opposing viewpoints. Also the clannishness of this Wizarding Civic generation is best displayed in OOTP with everyone's exclusion of Luna and other characters who don't "fit the norm" such as the awkward Neville and the swotish Hermione in PS/SS. Their generation is the focus of censoring educational reforms as the censoring Idealist that Umbridge represents. The political leaders have already become the ineffectual bumbling fool types, as Fudge displays. Their power in groups is best displayed in the achievements of the trio and the DOM six. However Harry's upbringing as a Nomad in the muggle world allows him to be the influential "Nomad" leader of the Wizarding Civic generation. However Harry also has a few Civic tendencies (as his lack of wanting to question Dumbledore despite Dumbledore's obvious manipulations shows), which make him able to act in both roles when he wants to.
So another reason why the Millennial generation love the book can be concluded they see themselves and the world they're growing up in, in Harry's friends and the Wizarding World.
Very much it's a story about a Nomadic leader (Harry), who leads a Civic generation (his Wizarding peers) to tear down the remnants of a world order built by the last Civics (Dumbledore and Walpurgia Black's generation--who either have "retired" from society like Dumbledore or died like Walpurgia) that has been torn apart and constantly weakened by split Idealists (Umbridge, Weasleys, Voldemort) who acted on the problems/issues that Adaptives found and had either tried to fix but only worsened (Fudge, Scrimegeor), and the Nomads of the Wizarding world either escaped into its fringes or were killed (Potters, Snape, young Blacks). Essentially Harry completes what his parents' generation could not. Partly because Harry is a Nomad/Civic combination leads to his ability to accomplish everything.
Quite frankly, the appeals to Generation X and the Millennial Generation are both there, because they can see themselves in the different characters. Generation Jones seems to like it more than the older Baby Boomers, as the general tendency is to vilify older Boomers (Umbridge, Voldemort), while sanctifying the younger Boomers/Gen Jones (Mr. & Mrs. Weasley). Also it's of little surprise that the Silents aren't amused at being portrayed as ineffective or weak (Fudge, Scrimegeor).
Generational interactions... I definately don't think JKR had any thoughts on it when she wrote her books. I just think they're in there, because she likes to parallel things in the real world, and these things can be found in the real world. I also like looking at books/ads/etc. in this manner because it's funny to see what Generation they're railing against or for. Oh, and JKR I believe is the British equivalent of a late Boomer/Generation Jones if I recall the British years accurately. So of course she gives us an edited Nomad dream (can't have the little Millennials getting ideas now can we?).
~Salamon2