What are some good unique, alternative, or psychological horror movies?

Ok..... Try "The Gift" excellent for the genre, if not somewhat mainstream... "Don't Look Back" - Of course, "Donnie Darko" - "The Machinist" "The Jacket" "The Devil's Backbone" Are what I can come up with offhand....Check 'em out on imdb. If you haven't seen them, I think you'll appreciate them... Hope that helps!... ;)