The only "Big Thing" that I feel is missing is something like TS2 Freetime or TS3 Ambitions, where they do some sort of overhaul of activities and skills, and maybe add some more, like football-teams, ballet, or pottery. However, I don't have my hopes high for an expansion pack focusing on this since we sort of have the activities in smaller forms already :p
Bands is also a thing that is missing, but I'm not sure if it needs a big expansion pack for that. A Game Pack would be fine too.
And of course, many suggestions in this thread would be very cool and interesting if they added, but I feel like the Big Things before have been: Seasons, Pets, University, City Living, Supernatural, Travelling, Work/Business, and Freetime.
