Not possible for me to say what type I like best, and like Xartis said, some like 'em thin and some like 'em well fed.

Personally, I like both, but it depends on whether she looks right (well balanced).  Some face types look better on a shapely babe-type body and some look better on a more slender type figure, but I honestly couldn't say say which is best or which I like best just lately.  What I don't like are figures where they have a fuller figure but the breasts aren't big enough to match the figure, or where the figure is lean but the breasts are too large and look out of place on a more slender figure.

One thing I hate is when the hips are narrow and the shoulders are wide, that just looks unbalanced to me (but again, everyone is different).