People who listen to obscure music simply because it's obscure are just as bad as people who won't listen to anything but premanufactured top-40 dreck. It's like the goth kids who claim they're expressing their individuality and protesting conformity by...all dressing exactly like one another. 2 sides of the same coin.
However, I really don't care what kind of music other people listen to. Unless, that is, somebody were to blast "Pon De Replay" in front of my house. Then I'd be very hard-pressed not to shoot them for subjecting me to that [censored] miscarriage of a song. Aside from that, I'm fairly open-minded.