Just like the Tatsunoko one post which Capcom character you enjoy playing.
 
Zero - Good string of moves and supers.
Frank - Just fun to play as.
Chun-Li - Very good combos and air combos.
Batsu Ichimonji - Rival Schools

I have the first game, but I've yet to play this revision.  Basde on all that I've seen so far, I would agree and say Zero's the best, but my heart will always be with Viewtiful Joe. (- who I hope has been tweaked significantly since the original)  

Im quite a fan of Soki. He is a slow moving character with a pretty ok range for his attacks but the damage he deals is quite heavy. I'm not all that good with him but i like to use him to cruise through the story mode.

Of the Capcom characters, I've had a surprisingly fun time using Batsu.  I never played the Rival Schools games, so he's a new character to me, but he's very quick for newcomers to pick up.  Frank is also entertaining to play.

Alex.