I've noticed a sort-of trend in that people who listen to more 'boppy' music tend to be happier than those who listen to more 'heavy' music. For an example of what each of those is...

Boppy = Pop, hip hop, dance, etc.
Heavy = Metal, grunge, emo, etc.

I listen to both, but lately I've been listening to a lot of pop and I've noticed that my mood generally improves depending on the upbeat feel of boppier music. I was just wondering if you think that the kind of music people listen to has any kind of influence on them. Note that I'm not talking about lyrics so much as the music itself.