My top two would be Get Together and Get to Work
Get Together for the large world, Club system, and games and things that give teens something to do.
Get to Work for the retail system, though it could use an update to give us a clothing challenge ( to open up CAS pieces, and be able to buy any CAS pieces off a rack or counter like jewelry counter glasses counter, shoes racks, clothes racks etc. And, food bins to make a grocery store look more like a market. It also has the 3 active careers of Doctor, Police Detective, and Scientist., and work places for them.
