Fuck them now: I'd never do such a thing, I'd be more liable to kill somebody where they stood. Still, I do have such thoughts occasionally, though my only criteria are a pretty face, and a nice petite body.

Meet 'em: They have to have that air of "geek" about them.
Approach me: Can't think of anything.
Avoid them: They look like normal human beings, which these days comprises sluts, drug addicts, drunks, and the like. Ugh.