re: gender non-conforming - personally, I hatehatehatehate that term. :/ it implies a necessary link between gender presentation and gender identity and that anyone who doesn't present in a way that fits the traditional binary gender roles must be nonbinary and that anyone who does present in a way that fits the traditional binary gender roles must be binary. (and on a personal level: i am conforming to a gender - MY gender, not anyone else's.)
I can understand that! I know what you mean too, because there’s something about it that rubs me up the wrong way. It’s like cis binary people are pointing at me, accusing me of wrongness and not conforming to their gender rules, and I find that unpleasant.
I’ll bet there are a lot of people out there who are holding “gender non-conforming” from a place of power and pride, too, like “screw you and your gender norms, I’m not going to conform” - and that’s awesome! But I just can’t make myself feel that way about the term.
I agree with you that gendered behaviour and gendered presentation are not necessarily linked to gender identity, and I am specifically looking into gender identity and language. If my interest was more about presentation or behaviour, I think gender non-conforming would perhaps be a more suitable term to have in the title? It’s hard to say, it’s not an area I know much about!
I guess whatever term ends up being used for the survey (and more widely used generally) will be hated by a bunch of people, which is annoying and hard to work around.