I love mutants but I wish more of them looked more... mutated than they do. Mutant Zafaras are super weak. But that's probably not that unpopular of an opinion.
The only other unpopular opinion I can think of that I have is that I wish Neopets would delve into edgy territory more often. Colors like mutant, Darigan and Tyrannian are cool as hell. Old plot bosses like Monoceraptor and Rock Beast were actually pretty spooky-looking. I want more of that kind of stuff. The original mutant Chia was way better than the artichoke head we have now, and I fucking love this Tyrannian Buzz, which was scrapped:
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