For Board Games we generally stick to Settlers of Catan, Zombies, and Dread Pirate.
We tend to play more card based games though. The current crop of games we play are:
Munchkin
Inn Fighting
Naval War (A hard to find, awesomely fun, simple game)
Guillotine
Family Business
Mille Bornes
We tend to like the "screw the other players" type of games, especially if they are fairly quick to play.
Way back, we used to play longer strategy games like Axis and Allies, Risk and Battletech, but these games generally take a longer time to play than we can usually get together for, so quicker games have become the usual for us.