I'm not a fan of goldies or oscars, pretty much for the same reason: in my opinion, they're big, ugly, and messy. Look great in other peoples' tanks but not for me. Not a huge fan of super deformed fish like balloon fish or ones with such long fins they cannot swim properly.
I agree, hybrid parrot fish freak me out too. Like Frankenfish gone bad. Most albino fish. Tinfoil barbs- look like comets to me. Mbuna- ugly & nasty. Dyed, painted, tattooed fish. Pirahna, Pacu, channel catfish, Bala sharks.
I STRONGLY dislike tetra's, really I haven't found/owned one I've liked ever. Which is a pain when asking for stocking ideas because no matter how many times you say you don't want tetras 9 out of 10 people still suggest them.