My take on Robin Williams is that in the dramas he's in, he always plays the same teddybear-esque character, but that character is always so humane that I like it. Good Will Hunting is the best example of this.
re: Session 9, I feel I have to defend it since I recommended it
I liked at least these things about it:
-I really noticed the music. It wasn't standard horror muzak but there were some very creative moves. At one point a guitar twang out of nowhere, and the scariest moments used some weird circus-like piano runs.
-beforehand, I thought David Caruso would suck (dunno why), but I really liked his performance
-the stuff said on the audio reels was truly disturbing
-one thing I noticed was that unlike most horror movies, the scariest scenes happened in broad daylight, even if they were indoors, and yet managed to be pretty creepy. I thought that was a sign of their effectiveness.
-the last line is one of the best endings to any movie I know, hands down.
What I missed was a distinct visual look a la Machinist. I actually thought Machinist was great but didn't like the ending. Overall, I'd actually prefer S9 to Machinist, although they're both good.