Like Plushiemancer, I am inordinately fond of Arkham Horror. We played frequently in the winter; perhaps we should break it out again. I've got the main set and then the King in Yellow, Lurker at the Threshold, and Innsmouth Horror expansions.
Most of my friends play Battlestar; I don't like games where you play against the others, so I haven't jumped on that bandwagon. I do love cooperative games, though, and so can't recommend Pandemic
I'm also of course a Munchkin fan. I run a custom deck made of original Munchkin + More Good Cards, Munchkin Bites, Munchkin Fu, and The Clown Wars, pruned for appropriate cards and with the addition of a handful of custom ones. I call it Chosen Munchkin
, and my extra cards are things like the +2 Bonus Glorious Solar ____ (adds to armour or weapons), the Moonsilver Tattooed ______ (allowing you to make an item or weapon stack with armour), the Level 7 Wyyyld Hunt (who may be joined by any monster with a Y in its name), or the dreaded Level 20 Ebon Penguin
Recently I've picked up Three Dragon Ante
and the expansion, Emperor's Gambit. I love card games (by which I mean, euchre, rummy, cribbage), but none of my close friends do, so I never play anymore. TDA is very poker and very rummy, but with just enough strategy and extra effects (and dragons) to make my friends think they're playing a different game.
My other favourite game ever is BANANAGRAMS. I am a fucking word puzzle freak. My little bro and I make me play with a handicap because I keep kicking his ass due to long nights playing Bookworm Adventures. My handicap: my bro chooses a word- any word he likes. I can't win if I don't spell it. Fuck, Bananagrams is a great game.