7. Ninja Burger
I've been looking at this one for a LONG time now, but never had any play experience with it or seen it played or anything. Main reason I haven't picked it up yet is I don't often have a large enough group to play those type of games with, it's usually my fiancee and myself playing. That and when we do have a group, they aren't as into games as the average geek, so they miss a lot of the jokes in games like Chez Geek. Bang! is a fantastic card game though if you've got 4+ people, even if they aren't experienced gamers.
(I left the card type games off my list since I thought we were just talking board games, but if we're adding card games in, I'd put in for Chez Geek (with whatever expansions), Bang!, Family Business, and Munchkin. And Ninja Burger on my Want To Try list)