This may be a relatively generic answer:
Cute (and I have varied tastes in "cute"); able to be both serious and clever; able to say interesting things in, ideally, an interesting voice (voice is a big part of what attracts me to someone); gently enthusiastic; and, often, possessed of a calmness.
I've used the term "geek-babe" to describe many of the women I've been attracted to, and that can be a wide and varied category. I like the term "geek-babe."
I try not to have a "type," but maybe I do and I'm just not self-aware enough to codify it. But you can ask me "Do you find ____________ attractive?" and I can say "Yes" or "No." I'll answer truthfully, too.
Yes, those whose gay-dar I've set off, I like girls. ;-)