I had to stop listening to one of my favorite artists because her songs would just drown me in melancholy until I couldn't bear to stand anymore. (god I miss her music so much) but I know I can't listen to it and improve. When I'm really down though I find that I can't listen to anything I usually listen to either--nothing uppity or remotely energetic. I would much rather listen to silence I guess partially because it echos what I feel on the inside. Emptiness.