So many roguelikes operate in total silence, particularly the ASCII ones, that I find I often put on a bit of music to soothe my weary questing path. I can't be alone in that. So what do you like to listen to when the dungeon calls?
This is why I always include music now in my games (all ascii-ish so far). Although it does make the bundle size quite a bit better, especially with music for different areas.
When I'm playing games without music I typically listen to whatever's new on soundcloud, which for me is EDM, mash-ups, and chap hop