Take Shelter: 30 minutes too long. I kept wanting to hit fast forward. I liked the idea, I liked the performances, the story was fine, I suspended disbelief. But it was too damn slow!
I am not speaking as a child of the internet and MTV, even though I am. Look, if Hitchcock could do a tale of horror, suspense, and uncertainty about possibly going mad in 90-100 minutes, then very few directors today should need 120. Tighten it up. Cut four scenes, and make all of them 1 minute shorter.