Sorry VIPPERs, but I really can't stand people who are uppity about music. Who cares? Does it really matter? Music is continually changing and the average person will always not be far enough ahead to be into the "next big thing." Why do you even want people to like your music anyways? When they start getting into it you're just going to call them "posers" or some equally idiotic term for the first five years of their fandom. And internet/other subcultures are different because they actually transcend a singular topic, and also require the participants to act in a certain way in order for it to function.
What culture is there around music? A bunch of people who happen to like the same sounds? "Oh man I love this song!" "Yeah me too!" "Remember that other song?" "Oh that song was great" It doesn't mean you have anything in common. Yeah I love ice cream, but I don't walk around Ben and Jerrys talking to other ice cream enthusiasts about how ice cream just isn't the "same anymore" and how the kids buying vanilla are idiots.