Since people are doing the other games:
Genesis:
I thought sysyphus was a horrible choice especially since he is an original character.
Manray is a cool choice but too bad he looks awful.
Triceraton is pretty cool.
Karai is cool but as a kid I'm not sure what I would have thought.
NES:
Hotspot kind of lame even though I like the character and had his action figure.
And since you guys are reviewing the games too:
SNES: This is no Street Fighter but the game is still pretty good and the graphics are awesome, made a perfect TMNT game.
Genesis: graphics look like crap but the style grows on you, for being a two button fighter its surprisingly good. Also The taunt button is pretty funny "Hello Baby"
NES: Counting its on the NES this is an amazing fighter and easily the best 8 bit fighter out there.