Kate is pretty much my idea of a perfect shape. Her mammories could be a tad smaller and i'd still be happy, though.
I don't really enjoy looking at breasts that are any larger than mid-sized grapefruit. Mostly because larger breasts tend to flop over, covering my favorite part - the crevis that runs along the bottom edge. If that valley is visible, i'm happy no matter what size they are. Nipples I prefer somewhere between the size of a quarter and half-dollar, and absolutly no puffies.
My favorite part of the entire female figure, however, is the belly. I absolutly love a stomach that has enough meat and peach fuzz to keep it warm. It can't be flat as a pancake, but not TOO bulgy either. Can't have any ribs showing. About enough meat so its one smooth slope down past the naval and to the shaven (waxed is prefered though) crotch.
Butts aren't really a huge deal to me, as long as it's made up for in other areas if it lacks. I generally like a little meat down there too, though. and again with the nice crease that outlines the bottom edge.
Of course, this all changes if it's a woman I love.