In the end, it's not that different from using the Story Progression mod. I want all other sims in town to live their own lives and not remain blank background noise, which means I appreciate it when other sims actually have jobs, skills, relationships etc. of their own. I find it a bit disappointing when your kids grow up, fall in love, marry, and then you discover that those spouses know less than one of your toddlers.
So yes, I appreciate it when creators have some sims of their own in worlds. I think the only time where I got second thoughts was when I had a world where the creator left their simself as one of the households. I wasn't sure if I should let them know what happened to that one :lol: .