I like the term queer because it doesn't tell the story. Saying I'm "pansexual" or "lesbian" or "trans" is telling more about myself than I want to tell.
Saying I'm "queer" (usually said when someone asks about my ex-spouse and I use a female pronoun) doesn't tell more of my story than I want to tell.
I don't like LGBTQQIAAA. It's turning people off to our cause, at the very time we want to win people over.
I've said it over and over again. Language is powerful. If you don't have a term people can use, they won't want to talk about LGBT rights, and if people don't talk about LGBT rights, they won't happen.
Non-queer people are reluctant to use the ever expanding alphabet soup because they're getting harder and harder and harder to remember.
I also think it marginalizes people who are not clued in (which, face it, is most people). They don't know what the second Q means or the third A and it makes them feel out of the loop. It shuts them out. These are the people we *want* on our side - people who don't pay a lot of attention, but who vote and have influence.