I've been looking for a list of hidden traits online and haven't found much about them. By hidden traits I mean traits that are NOT in CAS and are NOT in the list of traits that can be bought at the rewards store. They are traits that aren't named in the game. There were several in Sims 3 (fire resistant/pyromaniac, burglar/can apprehend burglar, rocker, etc.) and it's possible that there are a few in Sims 4
Left handed/Right handed
We also got one added in a patch called Has Been Scientist that allows former scientists to make serums.
Does anyone know more of these? Carl's only lists the traits found in the rewards store.