Tough call.  I'm a super Zelda fanatic, but Twilight was kind of a letdown for me.  Tetris was definitely huge.  I remember getting carsick all the time playing it on the shitty black & white gameboy in the back of our station wagon driving to grandma's or wherever.

On mere play hours alone, I went with Tetris.

Batman

Shit.  I loved the old-school Metroids and immediately voted in that direction.  Though James made an excellent argument about multiplayer, that almost makes me want to change my vote.

I guess the question here is whether to vote simply based on which I enjoyed more, or on which game is better in terms of historical importance...

Going with the classic pill-eater on this one.

Damn....I wasn't even thinking arcade (funny seeing that the title is arcade madness - wasn't it video game madness first?).  In fact, that could be an elmination in itself - classic arcade games.