My 3 picks would be:
1) Dating. Including dating activities and more romance interactions. I would especially love a dating website or app (like Tinder) where you can connect with Sims who are single & ready to mingle.
2) The return of zodiac signs with impactful influence on Sim's personalities. This pack could also include horoscopes that have a chance to predict something that would happen to your Sim that day/week. The addition for fortune tellers would also be a cool activity your Sims could go do.
3) Generations.
