What's your favorite part about The Sims 3?

I also play Sims 4 sometimes, and what the newer game completley fails to deliver are unique sims. Every sim, despite having different traits seems to be the same, has the same wishes and wants. And is a nervous wrack with the "emotions" changing every few seconds.

Every Sims 3 sim is different. Even if you create 2 sims with the same traits, they behave different, want different things, are absolutely not the same. I love that.