I go back and forth, but lean toward pot-bellies--i think because it tends to be the result of a stuffing, etc.
I also tend to prefer under 250 lbs as a body preference ( not that there aren't many beautiful 300+ bbws out there) just my preference.  And at a lower weight  ( say chubby or plump)  she would have rolls but could also puff out her belly to get the pot belly look.