I'll never understand how a fan base can make someone dislike the artist. What does even have to do with the artists themselves?
Anyway, to answer the question, I don't really anti-stan for someone to the point that I always go against them in threads but artists like Ke$ha, Katy, Rihanna, Nicki and Xtina are my least favorites.
tbh. if there is a poll involving gaga, I'll usually pick the other artist, unless i truly believe she is superior. little monsters tend to have a very inflated view of themselves/ fave.