Just as long as you're not a jerk about it. LOL.
It's okay to dislike something I like, I won't hate you for it. That would be a really stupid reason.
I know many people who don't like MLP: FiM, Glee, and many other things (not just TV shows) I love, but that's not automatically a reason to hate them or dislike them. Well, not for me at least.