No one will really be able to answer that question but you, but other people can make suggestions for consideration that may help you find the answer. I would suggest spending time with the feeling and approaching it like a puzzle. Is your repulsion to a thing proportional to it's popularity or does it not make a difference until it reaches some threshold? What in your mind makes a thing popular? Does it make a difference if you found out it was only popular with people you know but not popular in the larger community? What about the inverse? Do you care about what is popular to other distant cultures/languages that you will probably never interact with?
This may or may not lead to you finding the answer of "why", but it can help you better understand the dimensions of your personal quirk.