Cheetor underwent personality changes as he matured throughout Beast Wars and Beast Machines, each evolutionary step marked by a 'shell upgrade.'

Quote Originally Posted by Paulbot
I forget, did the epsiode "Only Human" cover anything like that? How did Rodimus, Arcee etc react to being in human bodies.
Only in terms of their physical limitations - they were otherwise unchanged... much like Agent Smith being loaded into a human mind. Strange how Spike's mind was severely altered when his consciousness was transferred into a Transformer shell -- seems that a human mind cannot stand being in a Cybertronian body whereas a Transformer's mind can happily habitate a human body!

Quote Originally Posted by Paulbot
I used to like the idea (unsupported in the cartoon fiction though) that the Transformers were indeed gender-less throughout G1 until during the BW the Maximals/Predacons scanned male/female animals, and by becoming male or female animals that was the reason that they developed gender, an otherwise foreign condition to them.
Yeah, I like IDW's explanation of gender in TFs with Spotlight: Arcee. Waaaaaay better than her G1 origins in the Marvel Comics (worst Furman story - ever). :/