Do you turn on aging?

Long lifespan and aging are how I play most, but even if I am playing aging off, I still have a cycle of so many seasonal rotations before an age up, etc. I do have birthdays' set for my Sims each "year" that I celebrate without aging up.

It depends on the save. If I'm rotating, aging for active on and NPC on/off every round of rotation. If I'm playing one household, aging on for everyone. I rarely turn aging off because I forget to age my sims up. That causes me to get bored, and abandon a save.

I play with aging for the active household and I turn it off when I need more time to do stuff.

Aging is always off. Like several others on this thread I age kids up when the story calls for it, but grown ups never age past adult. The only elders in my saves are the ones that were elders when the save started and even some of them get aged down to adult or young adult.

I did once age a young adult sim into an elder but that was part of a storyline where she wasn't aware that the one of her celebuserums was tainted. She was an actress but she decided to make the best of the situation while the Celebuserum people worked on an antidote. She wound up landing the role of a grandmother on a tv show. It was only supposed to be two or three episodes and then done, but the character was such a hit that she became the focus of the show and a global superstar. So when the Celebuserum people found the antidote after season three she told them to save it for the next sim who had the same reaction. I accidentally deleted that save a couple of years ago otherwise she'd still be playing that grandmother character on her tv show.

i play with aging fully turn off and do not let any of my sims age

They only age if I stick them in front of a cake.

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.

In my current big save I will play with ageing on if I have pets in the home. Sounds mean that I don't get attached to the pets, but I love them having lots of cute pets.
But also I will keep it off if the sims themselves are not at a point where I am happy for them to age. I will age them up manually when ready. Elders tend to move into a 'retirement home' to live with their friends. :) (Ageing on so they will die when it is time.)
Every so often I will turn the ageing for unplayed/NPCs on to keep in line with mine too. :)

On a 'regular save' I will leave all ageing on for everyone.

I play with aging off & age my sims up whenever I’m ready. I used to cheat my sims’ old age deaths, but ever ever since they got rid of the option to cheat either their deaths that way or the pets (I can’t remember), I just now move them out of the house when they’re old to act like that they’ve passed on, lol. I keep all of the NPCs & townies the same age, as well.

I want the world around my sims to age up with them so I keep aging on. For those that I grow attached to can always be saved to the library for another chance at life in a different save or I get crafty and use existing game features to extend their life. It's part of the fun for me.

I used to play on Long but Normal is more fitting over the years. I get bored if things drag on too long.