When it comes to what constitutes a good character design, it can be hard to quantify and harder still if you’re not a professional artist. One good indicator of what makes a bad character design, especially if the character’s supposed to be half animal, is the anatomy. As what somebody pointed out, if the half-animal character just possesses very few animal traits then it wouldn’t be convincing. Tweak the design to be more bestial, then it’s more convincing.
(This prompted me to give some of my half-animal characters body hair and pawlike hands and feet to make them look more animal, even if I didn’t want to go furry with them.)
Oddly enough, by this logic, something like Killing Bites has better character designs well at least for some characters as it doesn’t just stop with ears and tails but also fur and limbs. Seems like the cartoonist does have a good understanding of animal anatomy enough to make convincing and interesting human animal hybrids for all its faults. But it does make one wonder if good character design isn’t just about looking good but also being convincing.
Sometimes what is anatomically convincing doesn’t always make up for what’s aesthetically pleasing, in the sense that while giving a human character body hair, animal paws, eyes and tail would make for a more convincing animal-human look it’s also more uncanny and unsettling so that’s probably why most mangaka either stick to just animal ears and tail or outright furry designs as something that’s halfway between the two’s horrifying if drawn realistically.
Maybe that’s also the reason why Pawsy Tigra didn’t last long, giving pawlike hands in addition to a tail made her look too creepy for some people even if making her look creepy’s the only way she can get away with that outfit and her being half-tiger makes sense. A realistic style would only amplify the creepiness of the design, despite how much more convincing it looks (and its practical benefits in live action).
As for sexy outfits, some of them just look good as they’re pretty much there to arouse people. They’re also outfits that even no pop star would wear while dancing because they’re so impractical, judging from the fit there’s no way they can comfortably house big breasts without slipping away. They also appear to be uncomfortable to wear, maybe that’s why they’re good examples of bad character design no matter how arousing they look to some people.
So what’s aesthetically pleasing doesn’t always mean it’s a good character design, to me what makes a good character design has to be convincing either sartorially or anatomically so or both when it comes to constructing outfits a half human would wear.