Believe it or not, we game designers do play games even in our down time! I'm a big fan of
Smash Up and
Love Letter, from AEG. I'm very excited about
Loonacy from our pals at Looney Labs; I got to playtest it with them in Dallas last fall and this game is definitely a winner!
Lately, I've also been hooked on some really smooth iOS implementations of fun board games, including Lords of Waterdeep, Qwirkle, and Quarriors — all the fun and none of the setup time.
And, finally, if I'm allowed to plug my own company, I've been playing a lot of Castellan and Revolution! the past couple of months; they're both solid strategy games completely unlike Munchkin. That's probably one reason I like them!