Christopher Walken was it it. He's even creepy when he's trying not to be. His character (he played the relentless MacDuff as a new-agey vegetarian police detective, forever making jokes that don't get off the ground and listening to self-help tapes in his little car) is simultaneously single-minded and hapless. and the last shot of the movie is a bathetic hoot.
Good movie, says I. Somehow it escapes the "no Shakespeare adaptation gets made unless Julia Stiles is in it" rule. I'm thinking of writing a Shakespeare adaptation myself, just to annoy people.