I play Munchkin and variants now and then, I like it. At my household we interpret the Cheat card rather liberally (items you can't normally use which Cheat will enable include other players' items, items dug out of the discard pile or the deck, item-like door cards such as ships in Munchkin Booty, even items from other games, but so far nobody has dared pull out a yugioh card or anything like that).
Zombie Munchkin is one we only really play when company comes over, thanks to one game that amused the hell out of me and pissed off my roommates something fierce. That juju zombie's ability to recycle curses is hideously unfair when you're playing with only 3 players.