I would have to say hands-down my favorite soundtrack is Hedwig and the Angry Inch. Not only do I love the movie, but I love the music, which just serves to remind me of the brilliance that is Hedwig. It contains what I consider to be the best love song ever written ("The Origin of Love") which gets me all schmoopy everytime I hear it. I'll belt out "Exquisite Corpse" on the bus and get weird looks from everyone, but I don't care because I'm lost in this story the music creates. "Nails" is also another personal favorite, because I've definately had exes with martyr complexes. Ha, that rhymes. At any rate, Hedwig is the only soundtrack I own in which I love each and every song.