I'm only a big fan of a small number of fighters, and only really dislike a small number too. I am often indifferent, and just root for a certain fighter to win because it'll help set up a future match. For instance, I really don't care either way about Rocky Juarez and JM Marquez. But since I want to see Pacquiao-Marquez II, so I hope Marquez wins it. I was the same way about Castillo-Hatton. I normally would be indifferent, but I knew a Hatton win could set up a Mayweather fight, so I rooted for Hatton and was glad he won.