My gender is geek.

I usually say butch, but as soon as I started identifying as butch, I started finding ways to undermine the new gender role, like I did with the old one. This is a very geekish response. There are more things to it, but I am prepared to argue that geek is a gender identity.

The corresponding sexual identity is, of course, pervy geek fancier. I'm one of them, too.