It's gotta be Zelda for me. And the old Spyro games.

Pokémon!!!!1!
Freaking amazing. Hell, I still play it sometimes.

Homeworld and Diablo.

The Legend of Zelda (naturally) lol. Some of the classic Atari stuff and alot of arcade games. Yes, alot of these are old school games and this comment is showing my age (heaven forbid) Haha. But still being young of heart I still play video games today, some of the games I like are the GTA games, yes they're pretty much overblown, outlandish at times and seem to repeat themselves but nothing is more satisfying then crashing into other vehicles and taking you aggression out on bystanders. I also love first person corridor shooters like Doom, stick with the tried and true of blasting zombies and demons with a double barrel shotgun. Most recently I've been playing the hell out of Dead Island on 360.

Pokemon, Mario, Roller coaster Tycoon :3