Yes, it's complicated isn't it?
It may just be a relatively short-term thing. Rather like what happened to sexuality in the 1960s onwards, people have started to feel one heck of a lot freer to explore their gender identity. As a result there's something of an explosion of different ways to identify yourself. All of them essentially amount to the same sort of thing, though -- a way of pushing the boundaries of typical social gender norms, or even rejecting them altogether.
It does make for a confusing picture for anyone from outside, but it's not necessarily anything to worry about really. Just respect people's choices in how they identify and express themselves, and be sure to separate personality from identity. (Some people are, after all, just nasty, spiteful, short-tempered and rude -- and that's true of the trans spectrum as much as it is anywhere else!)
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To expand just a little on my previous post, I don't really know what I identify as yet. Ask me again this time next year -- as can be seen, I've been a little bit more open about it (and not just on AB, either, although not that many of my friends or family know yet), which will hopefully give me a chance to explore this side of me more freely. Once I've started to do that, I have no idea where it will -- or, equally, won't -- go.