i'll stop post-spamming after this - i just wanted to provide some context for where the term "masculine of center" (and "feminine of center") came from and how it is used.
http://brownboiproject.org/BBP%20Tow...nd%20Whole.pdf has a lot of info about brown boi's approach to understanding masculinity and gender and might be helpful for those wondering about the context of "masculine of center" and its meaning in (some) poc communities.
to me...masculine of center is no better or worse an umbrella term than queer, lgbt, gender non-conforming, etc. they're all problematic and everyone is bound to find something wrong with some of them, or not want to use them. but they can be useful for some people to communicate some things within some contexts.