Yeah, I really hated those Peri's weight jokes. I can understand them wanting to establish the Doctor as a bit of an arse, because Six was an arse - but having him make derogatory remarks about his Companion's physical features is completely unnecessary to establish Six's arseholeness as not only does it make you feel that he does not care for his Companion (which is the relationship central to the show), but it's particularly bad when you consider the Doctor as a role model.