I'd say Hockey, but honestly it's pretty underrated in comparison to Baseball and Americanized Football.
League of Legends, guilty pleasure I just like playing this casual styled MOBA. The classes are what do me in for it, tanking, jungling, etc...
Demon Souls / Dark Souls, love them both, and Dark Souls has a nexus modding community (which really adds some fun to the game.)
Fallout 3 / Fallout: New Vegas (Nexus modding being the reason I still care about the games.)
Minecraft: Mods, and fancy HD texture packs.
I also like Metallica.