I'm actually gonna get emotional about the implementation of wants and fears FINALLY!! ? In older games wants and fears were the main motivators in my day to day gameplay, and one of the main reasons I get bored with TS4 is because I have no (good) wants and fears to keep me interested during the down time of my long term story goals.
I hope these are gonna be well implemented, and not just like the current whims where they're the same for everyone and dependent on seasons/what home appliances you lack (really tired of my child sims wanting to buy a dishwasher).
Based off the other information in the article, it sounds like they have the opportunity to really focus on relationships and sim personalities, so fingers crossed. If they do this well, I think it'll be one of the best packs/updates to the game so far.