Settlers of Catan
Mark Maas invited me over to his house tonight to play Settlers of Catan with him and a roomate. It was a blast. It's a great strategy turn-based game sortof in the vein of risk, but only vaguely similar. It's nicely balanced, games aren't too long, and each game is different, so it stays challenging.
On a related note, I quickly updated my wish list for this Christmas to include Settlers of Catan and a few other things, but I'll probably update it again a few times as I think of more stuff.