I've found that since I have openly admitted my desires to crossdress (and maybe even go further), my attraction to women has decreased almost to nothing. I can still see the beauty of the female form, not to mention all the pretty clothing, but that's about it.
On the other hand, I don't seem to have any increased desire to be with a man. That's kind of a relief, but it does leave me in a kind of sexual limbo.
Anyone else have similar experiences?