Dark music is almost always a go for me. I feel it let's you express emotions you otherwise would have to keep bottled up. I feel it is a much needed outlet for me.
I wouldn't necessarily call it dark but the themes surrounding it are chilling.
[video=youtube;pQrQEmClpWc]https://www.youtube.com/watch?v=pQrQEmClpWc&list=FL4fvpS3DyGABIwXVL91D7_Q[/video]