On my computer, I mostly play World of Warcraft and Civ4 but I also own: Simcity 4, Sims 2, Age of Empire 3. I really regret reformatting my computer since I lost Black and White 2 and Anno 1701, both were great games.
I have a Nintendo DS as well, my most played games are: Fire Emblem: SS., various Pokemon versions, FF Tactics.
And a Wii, which I only use to play SSB but also have Zelda, Animal Crossing, Mario Kart and a few other games that don't actually belong to me but to my sisters.