I'm surprised at the results. Posts I've read previously made me think that most people played with aging on and I was the odd duck. I have a habit of going into houses I don't play and aging the kids manually if I want my sims kids friends to age with them. But I play aging off then age the kids up so they can move out of the house and make way for either additional children to be born or new sims to be added for various reasons. Uncle lost his job and wound up on our doorstep or brother was down on his luck & moved in. I've even moved Grandma in for a reliable nanny.