Rock music -- however that might be defined -- seems like it might actually be losing ground to rap ... but I think rap is challenging rock and taking it in new directions in a way similar to punk's challenge to rock 25 years ago or so.

Becoming a fan of (any musical style) is much like joining a particular church. It's often not the musical style or the message from the pulpit so much as the other people in the fan base, and what kind of identification you feel with them. ... Liking a kind of music involves taking to the scene as much as the style.