I didn't think about the charm aspect. I wish things were a bit different. For some reason, I seem to get tons of guests. I guess that's ok, but if you have a significant, an autonomous flirt is eventually going to offend someone. It might be nice, if one could have a significant AND be seen in public. As it is, I tend to avoid relationships in the Sims. For couples, it seems to work to just treat them like individuals. If they ever make a new version, it might be nice to increase the complexity, just a tad. I might like to see family play a bigger part. If you have relatives in a household, it might be cool to see them recognize each other more as related, than just individual adults, under the same roof. If you befriend one member of the family, maybe it could also affect how well you get along with other members of that household or how quickly you become acquainted, when meeting for the first time & other issues, similar to that.
In some ways, it's handy for your social bar, to be able to interact with Sim-friends 24 hours a day. However, maybe it might be nice to have consistent scheduling. If a Sim is employed, maybe they won't necessarily want to hang out in the afternoon, or invite you to parties, in the middle of the day. Maybe, they won't stay till 3am. I don't know. In some ways, it's handy, but in other ways, it's inconvenient. You don't want it to be so much like life, that's depressing to play, but maybe it shouldn't have an over abundance of drawbacks, that do not occur, in real life. Just a thought.