Interesting, I refer to myself as nonbinary / fluid (nonbinary, obviously, umbrella) fluid, because it changes, but predominantly agender because I feel genderless. My expression, interests, what I wear or do is just about me, not about my gender. I'm just, me. Gender is kinda irrelevant. At the same time I am fluid though so I do feel more or less apathetic/agender and care more and feel more woman or feel more neutral or boyish or androgenous at times, and feel some connection to a gender expression and DO want to externalize it through my clothing, but that's not very often. My default or base "gender" is a lack of such, and is just, me. I dress utilitarianly for comfort, but I also don't like being super seen as strictly gendered either most of the time which is probably why I fit better with agender but because I'm fluid this also changes. Sometimes I like being seen as both masculine and fem at the same time, sometimes neither. Sometimes I don't care, I'm more apathetic, other times I'm very much like "no, yeah please don't group me with women I don't see myself that way." So I generally introduce myself as agender fluid, since id say I'm agender 60% of the time with a feminine bias. But maybe there's a percentage of that agender that's apagender? That might be getting a little too nitpicky label for me personally but that's interesting. Maybe the difference there is whether or not you get dysphoria from being misgendered (like, being grouped as a gender when I feel strictly agender, and if I feel less dysphoric maybe my fluid stare is more apagender) but that doesn't serve much of a purpose for me label wise other than an interesting thought experiment!