... out of curiosity, what games have you all played outside of D&D?
Let's see. In no particular order:
Dungeon Crawl Classics, Trail of Cthulhu, Lamentations of the Flame Princess, Fiasco, Pathfinder Beginner Box, Feng Shui, Spirit of the Century, Final Stand, Thou Art But a Warrior, ZeFRS, In A Wicked Age, StarSiege: Event Horizon, Castles & Crusades, Tunnels & Trolls, a homebrewed GURPS "ultra light", Over the Edge, Thrash, Vampire: The Masquerade, Werewolf: The Apocalypse, Changeling: The Dreaming, Mage: The Ascension, Call of Cthulhu, Star Frontiers, Shadowrun, Cyberpunk (1.0 & 188.8.131.52), Marvel Super Heroes, DC Heroes, a mashup of Rolemaster & Spacemaster, TORG, Rifts, Palladium Fantasy, WFRP 1e, Top Secret, Twilight 2000, FASA Star Trek, Traveler, Villains & Vigilantes, Timemaster, Gamma World (1e, 2e & 4e), Space Opera, Vikings & Valkyries (mid-80s self-published game by a University of Manitoba student) ...
I think that's it. Our Burning Wheel campaign never got off the ground, which is a shame since I was itching to play my knife-master ex-serving girl atheist nun.