All excellent responses, especially Sara and Debbie!
For many crossdressers, definitely the "T", for others, not so much.
We're all individuals, and some fit nicely into certain labels, and others not.
For myself, I fit fairly solidly into identifying as a male, but I cross dress as a woman solely as a sexual turn-on, since I find women incredibly sexy.
From past readings of "Dear Abby" over the decades, I got the idea that this wasn't particularly uncommon...often women writing about their husbands' desire to cross-dress in their lingerie, etc.
But from reading the comments here, I seem to be a distinct minority.