For me, showers didn’t create a memory but big life events did, and I found it realistic that they would sometimes become very happy or very sad because they remembered the death of a friend or the birth of their baby or their wedding day or something. I haven’t played sims 4 in months so I don’t know if any of the new updates messed anything up, I haven’t experienced the whole “everyone is suddenly an introvert” thing that people are talking about.