Personality traits & Moods for villagers

Villagers, they are all the same apart from the fact that they have different jobs, they make the same sounds and are no different which makes them kind of boring. I think that villagers should have personality traits like; Curious, Angry, Happy, Sad etc... Each mood should change based on their 'karma' but personality should always stay the same. I think this would make the game intersingly better and fun to play.