I dm D&D3.5 and Warhammer RPG.
I play in MERP-, Deadlands- and CoC-games.
My favorite non-rpg games at the moment are Carcassone and
Munchkin.
But we also play other games like AlHambra, Corvus Magnus,
Puerto Rico, Duell of Ages, Zombies, etc.
I also used to play Warhammer Fantasy tabletop but the new
rules suck and the minis are way too expensive IMO.