Since you all seem to be describing the looks of this ideal woman, I thought I'd take some sort of poetic half-baked twist on this topic still.
Bonds of affection
She holds me close in the dark
Words need not be said
Interpret it how you will, but my ideal woman is anybody I can hold close and enjoy a moment with. Somebody who I can communicate entirely physically with, and feel a certain affection and emotion when I hold her close. The difference between awkward silence and enjoyable silence is how you feel about the other person. I can enjoy silence with very few people, and I have a special bond with all of them.
Small talk is there to make things seem less awkward. If you're awkward around somebody, perhaps talking will help sort that out a tad. When you truly have something special, you'll feel a close connection with them, whether the two of you speak or not. My ideal woman is this ideal of a person I can share a moment with.