I've never bothered paying much attention to african cichlids...but I gotta say frontosas/gibberosas look awesome and one day I will have a tank with a colony of mpimbwes or something better if i have $$$
I dislike tinfoil barbs and anything that's a man-made hybrid *cough* blood parrot.
My all time least favorite fish is the oscar!
Now I'm not hating on the oscar owners. I just think they are one of the ugliest bugeyed fish I've ever seen. The real reason I hate them is every time anyone sees my tank they automatically respond with why don't you get a school of oscars for it *face palm* Where do I even start with answering that question. Hence I hate oscars.