My problem with the personality is the same with the food category. Too little depth to them, too little categories to make a real difference.
Having a personality attribute being cosmetic to give characters more personality (pun intended) is more than fine, but there isn't enough variety. Instead of having it become an actual attribute that affect bonus stats, I wish it has a Galactic Civilization 3/4 like system, where we can customerize dialogue of what the characters say during certain triggers.