I main Ness. One, because not a lot of people use Ness, and it takes practice to get him down; IMO. However, his air game is probably my favorite part about him; since he's pretty much a god in the air. \o/
I secondly main Yoshi. I love Yoshi, mainly because of his Up+B. You can use it multiple times in the air; and if you're skilled enough, you can learn to use his Up+B as any normal Up+B. His air game is only good when combined with ground moves though; but I'm pretty good at transitioning between them I guess.
I've been trying to main Toon Link recently; and even with how easy it's supposed to be to grasp his gameplay, I'm just not feeling it. >_> I really only main characters that have a weird-ish Up+B, meaning yes; I also use Lucas. Only in certain occasions, though.
If anyone wants to Brawl, PM Friend Codes?