I find this hard to understand. Even when encouraged they will not align themselves to any kind of belief or value system. Personally I am attracted to a wide variety of different styles of music. One of my friends is keen on everything from skiffle and folk through to some serious classical music. I know it's not popular, but it's not terribly classical either.
Different people categorize music differently.
What I call Rock you may call Heavy Metal. What you call Jazz I might call Easy Listening. I believe that the same problems apply to all forms of categorization. The way we understand things is a very uncertain area of study and no one can be sure that they understood what someone else said. Intersubjective reality means that at least we can approximate someone else's meaning, but does not guarantee us any kind of certainty.