My dad plays, and has played, quite a lot of video games. We probably own around 500 computer games, all in all (rough guess, and not a chance I'm counting all of them). Kind of hard to say what his favourites are. He does play WoW, and EVE. I do know about one game he does love, and that's System Shock (can't recall whether it's 1 or 2).
My mother's favourite game is definitely Tetris, but she doesn't play it much. Lots of work, little spare time.
We used to play games together when me and my brother were younger, the ones I can remember are King's Quest (don't know which one), Worms and Action Soccer. Might have been some more, but can't remember any.