I really love anything that is dark and depressing sounding (figures, right?).
I like: Tocatta and Fugue in D Minor by J.S. Bach, Moonlight Sonata by Beethoven, Vivaldi Four Seasons Winter 1st Movement, Spring Waltz by Chopin, Fantasy in D Minor by Mozart etc.
I'm also a huge fan of media composers- Hans Zimmer is my favorite. I also really like John Murphy and John Williams. There are also a few Korean movies that I have seen with great sound tracks.