Well, now to the meme:
Reply and I'll give you four fandoms. You then have to make an entry writing about your favorite character from each fandom, and why.
lyphia gave me the following:
Chrno Crusade - Chrno. There are quite a few great characters in this anime, despite the trainwreck it is at times. But Chrno himself was a clear favorite. A demon reluctant to use the power he gets through his contract working for the church? Instant awesomeness right there. And that doesn't say nearly all about his personality. The guy is just too nice for his own good.
Code Geass - Shirley. How could it be anyone else
Mass Effect - Tali'Zorah Nar Rayya. As annwyd said about her here for another meme, I seem to "like the sweet and nerdy ones". :D Tali was another instant love. Maybe even a bit just for being a Quarian at first (yeah, I always love the poor outsiders), but more and more also for her awesome personality.
To Aru Majutsu no Index - I'd have to pick Touma here. Mostly for his attitude towards, well, everything. He may be an idiot at times, but there's also pure awesomeness in him, even more than in Mikoto. That, and being the main character, we'll get to see him the most, so it's easier to get to know him. Mikoto and Last Order come quite close as well, though.
edit: four more from helike:
Harry Potter - Draco Malfoy. Maybe influenced a bit by the fact that I read fanfics before the books themselves, but in the end JKR still made him pretty much what I imagined him to be.
Star Wars - Luke Skywalker. Who else, really? Of all the absolutely awesome characters in the SW universe, he still stands far above the others.
Wolf's Rain - Toboe. The shy, kind one, kind of obvious choice for me, really. Closely followed by Leara, though.
Inuyasha - Ayame. See the pattern already? :D Absolutely clear favorite, this one.