I like games like RPGs like Skyrim where I level up, kill all the things, gather materials, craft armor and potions, but also have a home and mingle with the NPCs.
Sims is like that for me but minus killing all the things. I like to level all the skills, collect all the stuff, complete every aspiration, mingle with NPCs... but I can have a WAY cooler and more customizable home.
Also, in Skyrim, the world and NPCs are already made. You have to play with what you are given. But in sims I get to create the NPCs and the world. I like that.
It’s also kind of like Minecraft for me. In Minecraft I gather every plant and animal and bring them to my home lot to start a farm. Similar to how I garden in TS4.
I also create a treasure room in every one of my houses where I display every collectible as I get them. With the ultimate goal of getting everything single one.