I can't (and wouldn't attempt to) speak for anyone else, but the label I use is Nobody9999 (okay, I use my actual name, which isn't any of your business -- consider that, as it's important here).
I don't broadcast my gender, sexual identity or personal sexual proclivities unless it's relevant in some way. This conversation, for instance -- my gender identity (whether it matches the hardware I have or not), what sorts of people/animals/objects/concepts hold my sexual interest, and/or what sorts of things I like to do with those, are completely irrelevant to you in this context.
And they're not relevant because my use of language doesn't depend on what sort of anatomy/identity I may have, nor does it depend on who or what I want to exchange bodily fluids with (assuming that's something I find sexually satisfying -- and I'm not saying that at all, just using it as an example) and in what way I wish to do so.
If we meet down the pub/on a dating site/at the laundromat/museum/washboard concert/etc. and I chat you up or vice versa, perhaps those things might become relevant.
But until that time, it's none of your damn business and I find your focus offensive. Please don't.