I think age reflects in some music, but there's a really interesting phenomenon. Rock and Roll music was very much music for youth, but as the youth grew up, they continued to listen to it. It's not so much that you have to be young to listen to rock music, but that you have to have grown up with it to an extent. All these rock stars who seemed like big icons of youth culture when they were young have now got old... and they still rock. What's funny is that it isn't nearly as embarrassing as I think young people might have thought that many years ago. You listen to old rockers and realise; Rock music is not about youth culture that much, it's simply great music. Obviously I'm only talking about a particular genre, and I kinda lost track of the thread, but hey, these are my observations.