It varies but is usually something that is soothing to me, but my list might seem weird to others.

Lately, Lacuna Coil really helps me. I think it is Christina Scabbia's voice.

Also Nine Inch Nails, The Cure, The Smiths, Alice in Chains, REM, Smashing Pumpkins, Leonard Cohen, Fleetwood Mac, Patti Smith, 10000 Maniacs, Dream Academy, Bad Religion, Butthole Surfers etc etc.

Sometimes it is Slayer, Megadeth or something like Obituary that is calming and makes me happy-ish.

No one ever accused me of being normal.