I don't think there is anything wrong with liking popular things and tbh this attitude that somehow you are better because you like more niche things is very close to snobbery. I am not saying that is your intention, but it can come off that way.

There are plenty of popular franchises that I've liked in the past. There are plenty of "slop" movies that I enjoy, I really like Mission Impossible movies, Fast and Furious movies. I've also liked some of the Call of Duty games. There is room for both.