Spike - Ape Escape series
Big Daddy - Bioshock 1/2
Cole/E. Cole - Infamous 1/2
Ratchet and Clank - R&C: A Crack in Time
Sly Cooper - Entire series
Isaac - Dead Space 1/2
Sackboy - 1/2
Nariko - Heavenly Sword
Ratchet & Clank - All of the Ratchet & Clank games (except 3 of them).
Jak & Daxter - Some of the Jak & Daxter games.
Sackboy - The 1st LittleBigPlanet.
Cole McGrath - inFamous 1 and 2 (I still have to play Festival of Blood).
Big Daddy - I'm about to play BioShock when I get my copy of BioShock Infinite.
Heihachi Mishima - I have played Tekken 5 (if that counts).
That's it, but I play as every character on All-Stars.