These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Nightmare Fuel: Psycho's arm has a creepy sort of casualness to it given the size and functionality of the thing. He also takes his face off. Oh and the face underneath? It looks like a mix between The Joker and a Terminator.
Viewers of sufficient age will notice immediately that L'Etranger is meant to be a sexual predator.
Max's infestation is pretty damn freaky.
Visual Effects of Awesome: While it hasn't aged well, the CGI was impressive for the time; the series moved to Cartoon Network because they were willing to continue funding for the third season as-is, whereas the WB wanted to switch it to traditional animation.