Music stimulates my brain and helps me come up with new ideas. I got most if not all my inspiration from music, and it doesn't even have to be my favourite music.
I don't particularly like Briney Spears, but that song in which she sings "Oops, I did it again" is like drugs to my mind. Something in that song makes me want to start typing an international bestseller right away.
Other than that, music doesn't do much to me. I envy people who can say that music makes them feel relaxed and safe.
Oh, and I also hate to sing along to music, and I hate it even more when someone else does it.