What do you do in the Sims 3?

I have multiple saves going on, each set in a different world. Like, i have one in sunset valley, one in starlight shores, and so on. I do play challenges, which mainly consists of me trying to achieve the lifetime wish i choose for my sims, and some of them are indeed challenging. I have recently started building too! I rarely tried to put that much effort into my builds before despite playing for years. That is because i started playing this game when i was like 12, and designing anything other than a box seemed waaay to hard for little me. I mean, it still kinda is for grown me as well, but at least i am having more fun trying nowadays :D