Yeah, that is hard. I guess I don't judge people based solely on looks.
Hm, if I have to choose, I'd have to go with Yancy Butler. I think it's more about what the characters she plays stands for. Tough independent woman, yet can still be feminine.
Or, I like the relate to the look of Jewel Staite, and again, the character she's known for playing, Kaylee from Firefly/Serenity, smart yet cute.
And I've always liked Jennifer Aniston, but I think that's for her personality as much as anything.