Don't mess with the Zohan - light, and political. Interesting combo that works.
Burn After Reading - clever, and definitely unexpected.
The Duchess - fantastic period detail, if only they'd bothered to put the same level of detail into character development it might have felt like it had a plot worthy of being turned into a film.
Sorry missed this post. Loved the Duchess as it's a period movie, however plotwise, dialogue...was a bit of a disappointment but I'm not sure if that was supposed to reflect the repressed feelings the characters felt. I'd only buy it on DVD for cinematic reference screengrabs.
I'm sad to say the last movie I watched was Disaster Movie, it was as terrible as expected but really we just couldn't be bothered waiting around for anything else to start.