I didn't choose any of these, because none of them really applied to me, and I don't consider myself a convert. My fleet just kind of picked up another ship.
And now you're in for a long and complicated story. Fear me.

I came into fandom as a R/Hr shipper. None of the other ships -- H/Hr, H/D, D/G, H/G -- even occurred to me. When I came across my first H/Hr story, my first reaction was kind of *blink*, but I read it. And, well, to be honest...it was really badly written and Hermione was perfect and Harry was a saint and Ron was evil and blech. I didn't like it at all. I started to read a bit of what I think was TiP, but I never found it plausible and I didn't have the patience to read long fics anyway. So I went about my merry way and kind of watched the Deathmarch Thread over at FA happening to other people.
Eventually some of my fandom friends convinced me to try a fic that featured H/Hr, but wasn't exclusively H/Hr. The fic was Clio's
Eight Ways From Sunday, which I can't recommend highly enough. I went "Okay, that was kind of plausible." So I went and tracked down other fics and read shipper arguments, and I realized H/Hr shippers weren't coming from left field. I've always been the kind of person who doesn't ship one ship exclusively, so I decided to try my hand at writing a little snippet. And it had appeal. It was a very different kind of relationship than R/Hr. I like different.
Anyway, that's how I wound up here. I didn't so much get converted as go "ooo, nifty!", but maybe that's understandable, given the fact that I multiship. I don't think H/Hr is better or worse than R/Hr (which, obviously, I still ship too). It's just different. Different is groovy.
/long-winded
- Lisse