I'll admit. I bought SC4 only to tie me over until SF4 comes out. Here's how I pass the time:
Ryu
Ken
Chun-Li
Blanka
Dhalsim
Zangief
Balrog(Boxer)
Vega(Claw)
Sagat
Bison(Dictator)
Cammy
Dan
Akuma
Makoto
Ibuki
Urien
Alex
And in case you prefer TMNT...
Leonardo
Donatello
Michelangelo
Raphael
Shredder
Splinter
April O'Neill
A few other randoms...
Joker
Harley Quinn
Ronald McDonald
Ryu
Ken
Chun-Li
Blanka
Dhalsim
Zangief
Balrog(Boxer)
Vega(Claw)
Sagat
Bison(Dictator)
Cammy
Dan
Akuma
Makoto
Ibuki
Urien
Alex
And in case you prefer TMNT...
Leonardo
Donatello
Michelangelo
Raphael
Shredder
Splinter
April O'Neill
A few other randoms...
Joker
Harley Quinn
Ronald McDonald