I'm a writer, and some of the most inspiring music for me is actually dark, twisted ambient music and orchestral music (specifically the kind of "longing" sound in some songs). I like music that creates a dark, foggy atmosphere around me, it's both soothing and helps me generate ideas more quickly. I also listen to slow, ambient post-rock while I try to sleep. Look up the song "You Lost the Starlight in Your Eyes" by Hammock - they're what I sleep to.