I enjoyed the following
51 Birch Street - Documentary filmmaker Doug Block didn't plan on doing a documentary on his parents. However, within months of his mother's sudden death, his father marries his former secretary and Block realizes his parent's marriage may not have been as good as he thought it was.
In the Realms of the Unreal - Fascinating documentary about Henry Darger, a janitor who lived a poor, solitary life. At the end of his life his landlord discovered a 15,000 illustrated novel entitled "In the Realms of the Unreal" in his room. Dakota Fanning narrated.
In the Realms of the Unreal
Game Over: Kasparov and the Machine - A look at Kasparov's match against Deep Blue from his perspective. The documentary deals with Kasparov's suspicion that human intervention was involved and the affect it had on him and the match.
Tarnation - Filmmaker Jonathan Caouette's documentary on growing up with his schizophrenic mother. Probably a bit to disturbing to say I enjoyed this, but it was interesting viewing.