Oh god, William Basinski's Disintegration Loops. Listening to every part, one after the other, is like letting your heart just slowly break over the span of five hours. I know some people find it to be very peaceful, and it is, but it is in a harrowing way, I think. Like watching flames slowly consume a field in the dawn hours. Or something. Everyone should give it a try at least once.
I'm going to post a sample of it even though I probably shouldn't because listening to just bits and pieces of it takes away from the experience--still, at least you can see if it might be your 'thing,' so to speak.