The current 'build' category needs a new value - Thick. Based on others reviews of women I've seen, I think guys are hesitant to use flabby and heavy. I've seen at least a few 'thick' ladies described as athletic or baby fat. Heavy comes across as a rude and leans toward saying unattractive. I think guys want to be truthful but if they liked the lady don't want to come across as insulting (well, some of us anyway). Since many of providers are using 'thick' to describe themselves, I think it'd work here, too.

I've always loved that one.

I agree with you, I mean it can't hurt to be as detailed as you can. I prefer thick woman myself,  I usually the words voluptuous or curvaceous when describing girls with thick womanly bodies.