> Williams was great in just about anything he was ever in, I wouldn't attribute that to Nolan.

I don't know, I might. You don't even see Finch for half the film, only hear him, and the villain left an impression on me not unlike Kiefer Sutherland's villain in Phone Booth (an otherwise unremarkable film). I can't think of another villain role that Robin Williams performed, probably because nobody was brave enough to take that kind of risk with a heavyweight positive actor -- Insomnia came out a few years after Good Will Hunting and Dead Poets Society, which helped establish his mastery of drama, but nobody wanted to make him the bad guy. Nolan did, and it was very satisfying to watch.

(I take that back, One Hour Photo was great, too. I knew I was forgetting one.)