What should the next theme be?

I want something new enough "stuff" I want a pack that will improve the Sims themselves that does not require an object to do so. Lets call this pack "The Sims: Stuff that should of been in base game" since they have been ignored pretty much since base game this pack would fix the useless traits adding personality to the Sims, turn ons /turn offs, likes dislikes, enemies, wants fears and the fear emotion to go with it, basic animations and actually have the ability to interact with other Sims be it dance or kids playing together.