Forgetting Sarah Marshall dragged quite a bit.
Pineapple Express was solid hilarity.
Wanted had a few truly exceptionally shot/edited scenes but required a very high suspension of disbelief (yes, I know it's based on a graphic novel) and was still kinda super dumb.
I didn't like Burn After Reading on first viewing (I was expecting something drastically different) but surprisingly, I enjoyed watching it a second time. Was surprised that I didn't feel bored during the second run through.
I feel similarly about Tropic Thunder. Didn't think it was memorable/recommendable on first viewing, ended up watching it again with a friend and didn't feel bored. Cruise and Downey Jr. were great - just wish Black had a better part since I normally love him onscreen. Now that I think about it, I wish Bill Hader had a bigger role as well since I really liked him in Superbad and thought his tiny role in Sarah Marshall was hilarious (namely the webcam gags).