I only use pansexual when I'm among people whom I know will understand what that means, otherwise I use queer. I feel that queer places me in a category full of rainbow flags and pride parades, which don't get me wrong are fun and enjoyable, but just aren't my niche.
Altogether, I'd much prefer to just say "I'm human". I make decisions based not on gender or sexual orientation but on whether or not I find I have a connection with someone. Sometimes it's the wrong decision. I've found gay men are occasionally attracted to me, but does that make them suddenly queer or suddenly bi?
In my mind, sexuality (like much of life) is like this quote by T.S. Eliot:
"Every experience is a paradox in that it means to be absolute, and yet is relative; in that it somehow always goes beyond itself and yet never escapes itself."