Latest addition and it might become one of my favorites: Citadels. Nice mix of complexity / strategy and bluffing. Not too long and pretty varied due to the many characters that change each time you play it. I expect high replayability. Very little downtime, so nobody gets bored.
I also just ordered Marco Polo 2 after some hesitation. In general, I like that publisher (Hans im Glück) a lot because they actually think about the mechanics before releasing a game and they always have good manuals. Let's see.
Any new games you've been playing?