Kind of getting off-topic here, but it is interesting to think just how much of an effect others have on the things that we like, even the things that we consider most personal to us. With music, for example, most of us probably find new music through recommendations, be it from friends or people on the internet. And of course, you could certainly argue that popular music is only popular because it is forcefully put in front of people. Many people only listen to songs when they become popular, and through that, they become more popular... in a lot of ways, the record companies tell us what to like.
Regardless, the best thing to do is to not care about that crap and just continue liking what you like.