My professional field (relatively new) has been going through the definitional wars and the "one title to rule them all" competition -- although lately some of the leading figures have been encouraging folks to think about the field as a communities. In other words, recognizing the differences that do exist between people with different backgrounds and focus, but ultimately we've got a lot more in common (and those commonalities are what set us apart from other fields).
It's a pretty good model for the trans communities. But in our case it's worth taking a step back from the internecine squabbling and recognize that those who hate us rarely draw distinctions transsexuals, crossdressers, drag queens, gays, effeminate straight men, etc. As Benjamin Franklin said, we must all hang together, or assuredly we shall all hang separately.