Curvaceous is all. I do not need her to have big boobs but a nice ass is what I am into. I am against the big boob and flat ass thing. Kim Kardashian shape or Sofia Vergara as you mentioned are ideal.
Not skinny. Trim but some muscle tone is absolute best. Curvy is the important thing, though. And actually, making up your own mind about how you want to look is the most important thing. If you don't like you then no one else will, either.