Can't really say I have a preferred type of game. I play them all, from FPS, RTS, RPG, to Racing. I just tend to be rather picky with what eats up my time since I don't use a whole lot of it to play. So... quality over quantity here.

Also, I'm fairly casual in my gaming too, and not at all a competetive type, so I tend to avoid heavily PvP styled games, but I love me some co-op.