Music is great; it all depends on what mood you're in, what you want to listen to. If it's party time, you listen to, you know, party music, if you want to dance with somebody. But then again, if it's a slow dance, you need something slow.
I think that generally music should be a positive thing, I like Bob Marley's attitude: he said that his goal in life was to single handedly fight all the evil in the world with nothing but music, and when he went to a place he didn't go to play, he went to conquer.