Personally, I'd want build presets to be 'athletically slender', 'fit and balanced', and 'stocky and imposing'; I'd favour these kinds of descriptors because ultimately our characters should still look like healthy and capable adventurers.
Properly made female dwarf should be at least curvy. :P
Dont forget that we are not some adventurers, that was keeping themselves in shape to adventure ... we were abducked from our everyday life, so to have option to be a little more chubby at least is a must have! That is for one.
For two, there is litteraly no reason for casters to not being fat, on the contrary there is reasons for fat Wizzards ... especialy if you think about combination of lazyness and levitation spell usage.
