I am currently not a fan of my evil female guppy who keeps attacking her tank mates.
I also don't like mollies...I can never keep them alive!!! I've gone through 4 balloons and like 3 normal mollies...
I don't like arowanas, oscars, gars... anything super aggressive, really. It's not that I dislike them, really - it's just that they scare me out of my mind. I'm more of a sweet little tetra/danio/cory kind of person... )
I don't like bubble eye goldfish as a breed. I think it's cruel to breed a fishy like that. I also don't like pearlscales. I feel sorry for the fishies (I like the fishies just not the breed).