Sometimes, I try to balance out my mood with a song from the other side. So, if I wake up and I'm feeling agitated and what I suppose might be hypomanic, I'll try to simmer down with my music. I like Joy Division and New Order to mellow out, sometimes the Psychedelic Furs, too.

When I want to space out and just let my mind wander, its Tori Amos (almost always From the Choirgirl Hotel). When I need a boost, I take it back to the early-to-mid 60s with The Sonics.

At night, its M83 and My Bloody Valentine, to ease me off to sleep.

Interesting question, btw.