My playstyle sounds very similar - I have one main save, a very loose rotation though I like to keep aging either normal or long. The aging progress is really slow though because I play thirty or more households. Ideally I'd like to build some history or add characteristics to each world and then the families living there would get to enjoy this rich environment. However I do sometimes have trouble tying the loose ends and also when sims die it can leave an empty spot. Like I had this cult kind of neighbourhood in Oasis Springs where the leader died and I haven't had clear idea how to build the community back up. Generally there's just a lot to keep up with, but I like to aim high despite the hit and miss success. I also just enjoy different kind of families, all sorts of occults and personalities. I have real trouble letting go of families. I think having the aging on makes it more difficult, I just want to be with them until the end. I've been writing blog stories from my save since 2015. There's so much going on that's not ending up in the blog, but at least I always have something to write about when an inspiration hits.