In the course of both working on some of my fictional creature designs and thinking about other creators' own fictional creatures, I've come to realize the utility of having consistent terminology for clarifying the specifics of a creature's morphological humanoidness. After all, while both Kryptonians and krogans are "humanoid" in appearance, they are so in very different ways. And in my experience, already existing constructions such as "vaguely humanoid" appear to be inconsistently used to mean several things that may or may not be included in some of the other usages.
To that end, I ask this: What would be the best way to design a standardized "humanoidness classification system"? Specific points of concern include the following non-exhaustive list (which may be amended in the future in response to feedback):
- Number of categories: How many categories of "humanoidness" should there be?
- Naming of categories: How should the categories be named?
PS: I will provide my current proposal for such a system as an "answer" to this question, to keep the comments specifically about it separate from comments specifically about this post.