Tummy. I love a fat bitch with a squishy tummy they'll let me use as a pillow. Soft squishy hips for me to press my face into or use as handles while I fuck them stupid. But truthfully I like all three. If a girl has the trinity [fat ass, boobs, and belly] I am going to like, hopelessly fawn over their body if they let me. Give them massages as a shameless excuse to feel the squish.