Personality should be the main focus of this game.

I don't remember much about the Sims 2 these days but one thing I do remember is that I would go out of my way to avoid romance sims in that game. As much I do want improvements to the personalities of the Sims 4 sims I do not want them to have so much personality that I actually find it annoying and obnoxious to play with at the same time.