One: She can't be stupid. This is non-negotiable.
Two: Has to be healthy; neither anorexic nor morbidly obese.
Three: No serious drug problems.
Four: Not a murderer.
Five: Can't look anything like my mother.
Everything else, we can work around.

Also, I seem to be drawn to bisexual girls. And I've only been seriously attracted to three girls in my life and all three have a name ending in a soft A sound; not sure if that's significant.