I wouldn't say it's a good blend of a sandbox and life simulation but overall it's OK. The programming is wonky which makes it pretty hard to "tell your own story" when the game keeps forcing things on you like the multitude of townies that it generates who then follow your Sims wherever they go.
The game generates families with terrible traits. If one parent is mean then the other parent is likely to be either evil or hates children and one of the kids is probably a kleptomaniac. If there's only one parent then it will probably be mean, evil, or hates children.
I get a lot of elderly female Vampires that have no skills. If they do have a skill it will be Level 15 Vampire Lore.
Aliens are predominantly adult or young adult females that have three or four skills that almost always include painting.
I get a lot of female NPCs in various roles like mail carriers, pizza delivery, yoga instructors, bartenders, gym instructors. They almost always have four or five skills which almost always include painting and singing.
Maxis, in the meantime, has created an overabundance of pre-made Sims that have the Creative trait or who are Music or Art Lovers. Most of these are females and all of them show up wherever there's an easel. Several also appear as street musicians.
I haven't done a count yet but it seems that townies and premades come in three main varieties - Musers, Quick Learners, or Collectiors. If someone gets the Dastardly or Domestic trait then that will go to a townie Vampire.