@Satinavian: you answered the wrong question, mostly just reiterating what Errorname already said. You were already granted that being "always evil" and equivalent caricatures aren't particularly interesting use of non-humans. In context of your reply: yeah, you can base your non-humans around physical rather than behavioral traits, but why would you? Because implicit in that idea is that you can use human with a jetpack to explore the same space as a winged humanoid (so on and so forth).

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@ErrorName:

I think this question ends up running into the "why do we have non-human humanoids at all?" question.
Yes. That is the point. I gave you one possible answer for free just to show the question isn't an impossible one.