Favorite Movie Soundtrack

For me it was
Requiem for a Dream.

Chronos Quartet, very haunting, very gripping, fit the movie like a glove.

ANybody else?
Matti - there are at least 2 votes for Gladiator. One is mine from 2 days ago. But it's good enough to mention again. Good call.
I always liked the "Jaws" and "Raiders of the Lost Ark" soundtracks. It helps that the films are two of my all-time favorites, but I always thought that the music stood well on its own. John Williams is one of the most brilliant film composers I've ever heard. His resume is staggering.
Try the soundtrack from the movie Diva.
It was a great French movie with English subtitles. Very cool. An exciting new wave very cool sounding and looking film.