Music has been broken down into racial and cultural categories (i.e. Rap being Black, Rock being white, Country being for southern white etc.)
I myself, am black, and truthfully mainly listen to "rap" (but not the new garbage, old school) with the exception of some RnB. I choose within myself to not listen to rock, not that i don't believe it is good music or that its for white people, just for some strange reason it doesn't appeal to me. But i hate when people categorize others by what they listen to.
For example, i have a friend (whom is black) and listens to heavy amount of R