Really good post. This is my first time ever hearing the term demiboy. I still prefer to just say that I'm a transman/transboy (I use both interchangeably, and sometimes use transmale, although I feel that's not a 'correct' term given that sex and gender aren't the same thing) as that's just the term I feel most identified with. However, I do maintain some of my feminine traits, and I don't try to suppress them. I accept that I was socialized as a female/girl, and therefore it is natural for me to maintain some traits that were socialized into me that would not have been socialized into a cismale. I understand, though, that some people who identify as trans may not embrace these traits. And will either not have them at all due to refusing to during the learning process, or choose to suppress them. (For much of my life, I did the latter)

I prefer male pronouns, I prefer being seen as a boy (albeit feminine at times - here's the kicker, so are some cisboys! their identity is never questioned, why should mine be?), and I do not at all like when lesbians or straight men show interest in pursuing me (as it often makes me feel uncomfortable about my identity). But I do still wear tight fighting shirts sometimes. Occasionally, I even wear dresses. I like Frozen, and I twirl my hair around my fingers at times. These things are not inherently 'woman' things, but many would consider them feminine due to socialization. That's what makes gender fun to me. The fact that it is, largely, socialization (as well as genetics and environment, of course).

I like the term demiboy. I probably won't use it for myself, but knowing there is a term for how I feel is great. I'm glad you found it. This is more text than I intended, too lol I just get so passionate about the topic of gender and sociology.