I'm not all that fussed. My girlfriends "skinny"ish, not like skin and bone or anything, but slim, and I like that, but then again I wouldn't mind if she was a bit bigger.
I don't find excessively thin girls attractive, nor do I find overweight/obese girls attractive. So supermodels get a definite thumbs down.
Oh but I love a decent appetite! It's good to see a girl sit down and eat a proper sized meal (whether it be good food, or shit takeway). Absolutely cannot stand chicks who will only ever buy a happy meal and then complain about how fat and disgusting it will make them, they need a good punching in the face.
Ok so basically I like girls who aren't obsessed with their image, really skinny girls and overweight girls almost always fall into the obsessed category.