everything from medieval to punk... i love music even more than i love fabric, so it runs the gamut! if i'm working on a specific "era", though, i tend to listen to that time's music. a 30's repro fabric or pattern just screams for that time's music to be played. ditto with 40's , 50's, etc.
when i sew costuming or garb, same deal. renaissance garb demands music from those times. it's my own kind of time machine, i guess.