Major trait in sims 4 that I think impacting how sims behave are only : Slob (autonomous fart, leaving pile of clothes, dishes etc) Glutton (different eating animation, autonomously search for food in a trashcan) Kleptomaniac, Active, Clumsy & Mean, these three traits really affect sims' personality because they didnt just lazily add specific emotions/moodlet, I think sims 4 need more of these traits in the game, probably something like Innapropriate, Brooding, Brave, Coward, Grumpy, Excitable, Easily Impressed, Schmoozer