Real tough one here...

I'd probably either say Street Fighter II for super nintendo or donkey kong classic for the original nintendo.

this can go alot of ways...

favorite board game...(tie) Monopoly and Scattergories

favorite online game...solitaire

favorite game to play on my cell...Bejeweled

favorite video game...(old school) asteroids from atari...my dad STILL has it and it works!

favorite game from usanetworknow...THAT DAMN MARBLE GAME!! lol

I know...I know...I didnt follow the rules! *shrugs and smiles* hehe