I'm a yaoi fan. I do fanart, mostly fanfiction, and I'm trying to do shonen ai amvs (nothing explicit enough to be pure yaoi). If you like fanfiction, my favorite pairings are Kurama/Hiei, 1x2, 3x4, 6x5, Goku/Vegeta, Sano/Kenshin, Sephiroth/Vincent, Tsuzuki/Hisoka, Oishi/Eiji (PoT), Kagetsuya/Chihaya (Earthian), and lots more.
My fanart and fanfiction can be found here:
http://www.geocities.com/arigatomina
Just check the warnings and such when you get to the fiction. ^_~
I'm very picky when it comes to my pairings in fiction or other genres - characterization *is* important, but it really depends on how *I* see the characters. I've read some horribly out of character fics for Hiei and Kurama that would make me hate the pairing if I hadn't read some that match up perfectly with how I imagine the characters. So it really depends. When I started writing fanfiction, I was very much into 1x2 (note that my Gundam Wing fic page is huge compared to my newer interests) - but I changed my mind about how I viewed the characters, so I now look back at many of my fics as being horridly out-of-character. It's all dependent.
My favorite pairing right now is definitely Kurama/Hiei - and no, I don't mean with an effeminate Kurama. He may look like a 'girly guy' but I consider him quite masculine, especially when angry. And Hiei is my ideal uke, so I can't say he is put in the role of 'female' when it comes to my preferred pairings. His masculinity is what makes me like him so much. No matter what the circumstances, he'd never be a crying whiny effeminate character (like many Mary Sue's I've seen).