I have music on in the background for everything I do besides sleeping. And it can't just be the same music, I have to constantly find new music because I get used to it and then it becomes just noise that I don't even register. And it can't be just any new music, it has to be stimulating in the right way.
Sleeping is pretty much the only time I don't have music on. I will usually have it on while napping, but not when going to bed. On rare occasion I will play rain thunder and flute sounds while I sleep/nap, when I want the soothing sound of rain and it isn't raining outside.
Well, there is one other time I turn of my music, but that'd be tmi.