Metal, Pop, Depression and Other Fun Stuff. (MPDOFS?)

Here's something interesting-- I remembered a discussion I'd had with a friend of mine regarding metal (music, not substance), and an interesting point was brought to my attention. While the discussion was pretty drawn out, the basic conclusion was this: people listen to music to correspond to a mood, and music tends not to work the other way. However, some of my less... screamily inclined friends have testified just the opposite; that they listen to happy music when they are sad, and not vice versa, which is my style. Who knows; I tend not to like much happy music at all, so this could be an idiosyncrasy based on my cynicism, and not musical tastes. Still, I think it interesting that those who like darker music tend to listen to it when the corresponding mood takes them. I wonder if this means that metalheads simply have darker dark patches than pop listeners. As to that matter, what "dark" music is really popular at all right now? Or maybe a loathing for pop has lead me to become cynical and occasionally depressed, and that's what drove me to metal.
Basically, I conclude that is possible that pop radio may be responsible for depression today.

In all seriousness, though,l I do think that most good music was caused by a wish to move directly against or away from the dishonesty and disingenuousness that is pop.

Well, that and LSD.