I would like to be able to see how healthy a food is in the UI. Just a qualitative: Unhealthy, Healthy, Very Healthy would suffice. I think that relationships (friendly and romantic) should have ceilings/floors that are tied into the special moments system. Once a sim would reach the next threshold a special moment is a marker that carries you to the next level. It could also act as a barrier for excessive regress barring a bad moment. For example a Best Friend could regress to a Good Friend but would need a falling out to become less.