Detachment
Dark, all-star melodrama with Adrien Brody, Marcia Gay Harden, James Caan, Christina Hendricks, Lucy Liu, Blythe Danner, Tim Blake Nelson, William Petersen, and Bryan Cranston. I believe I read a favorable review in this thread, so I gave it a shot.
Wouldn't recommend this movie to most people, but I'm glad I saw it. This could have been good in the way that Half Nelson was good. But where that movie succeeded, this one packs far too much in the plot. Rather than focus on the two or three strongest stories, the movie packs in every single dramatic confrontation it can.
Still, if you like dark, intense dramas, give it a shot.