I like to listen to Silent Hill and The Ring soundtracks.
Creepy.
You people need to learn how to make a proper music thread. Suggestions are great (and I'm definitely looking some of these up) but use links! You gotta have links!
All the stuff by Akira Yamoaoka, like the Silent Hill soundtracks, is gold:
http://www.youtube.com/watch?v=nyd2loU5eOw
http://www.youtube.com/watch?v=T4HfgwLmyd8
http://www.youtube.com/watch?v=KI5YV-jok1U
http://www.youtube.com/watch?v=VCoRc3hX99U
I don't write horror (intentionally), but I do write Dark Fantasy.
I put on music I hate so much that it makes me want to kill things gruesomely.
Stuff like I'm Walking on Sunshine by whoever that was that should eat s*** and die horribly. Anything by Michael Bolton also qualifies.
I know that Michael Bolton worked really well when writing the torture scene on my present MIP, FWIW.
Lux Aeterna by Gyorgiy Ligeti
Polymorphia by Krzysztof Penderecki
Moon by Fracture 4
Todesvogel by Stormtrooper
Exit to Extinction by Chris McCormick
What is that Sound by Chris McCormick