I like to analyze music when I listen to it, so I can't really listen while I work or I will get distracted. I do is more as a recreational thing. I plan a time to sit down and listen to music, much like I would sit down to play games or watch a movie.
I often play music, usually soft instrumental music of some sort. Except when I'm reading, I like to be in complete silence while reading, unless I'm at the library where I have to isolate myself from my surroundings.
When I do origami it's a different story. I don't have to think much so I can listen to spoken words. Actually, my retention is greatly enhanced when doing origami, so that it's very convenient for me to put on some history lessons for example. But sometimes I don't want to be studying all the time so I listen to some form of comedy.
I like to listen to music to make dull tasks like cleaning flat, washing dishes etc more bearable.
I never listen to music while doing things which require concentration.
Classical piano is the way to go for me. Anything by Chopin and Debussy specially. It's just so calming. It helps me relax, focus and sleep.