I've often used the concept of having a male brain in a female body to describe my gender idenitity confusion, and the odd thing is that it might be true. Conditions on the Autistic spectrum, such as Asperger Syndrome which I may have, are said to be exaggerated versions of normal characteristics of the male brain.
Could it be that I'm on the autistic spectrum instead of being a female-to-male transsexual?

You may recognise the surname 'Baron-Cohen' in the below links, and you'd be right to think of a certain comedian. Professor Simon Baron-Cohen, who studies developmental psychological problems, is the cousin of Sacha Baron Cohen. Jagshemash!

Autism 'extreme male brain' clue
The Male Condition
Testosterone finding backs the ‘extreme male brain’ autism theory.

Finally, here's an amusing quiz that backs up the idea - apparently, I'm far more systemizing than empathic.