There's a lot of beauty to be found in sadness and melancholia. One of the things that you find time and time again - not just with music, but with literature - is that things that appear to be quite depressing on the surface can ironically be very uplifting and touching to other people. When you hear something that really reminds you that you're not alone in feeling sad, depressed, melancholic, angry - I think that can actually be a very cathartic experience.
