In his autobiography Doohan said he did his own hair. Spent 5 minutes in the makeup chair while Nimoy was stuck there for hours. I thought Doohan's hair was awful when he slicked it back and Takei had some weird hair in Season 3 "That Which Survives" I'd say 90% of Chapel's hair was unflattering but I suppose it gradually got worse in Season 3. I'd say 20% of Uhura's wigs were unflattering but that wasn't season dependent. I didn't notice anyone getting fatter until the movies. I though Shatner's weight went up and down a bit but I'd never have called him fat.