Which one of this packs is essential to your gameplay?

None of these are essential. I actually don't own any of these stuff packs. I want a few of them. I'd like to own toddler stuff and kids stuff and a few other packs because they'd add some cool furniture and stuff, but they aren't necessary for me to play the game and I don't don't really miss them. I just with that I had more options some times. But, also, it's just "stuff". Gameplay is what makes or brakes a game for me.