We have 4 children - 7, 6, 4.5 and 3 weeks. We were done after the third but then I wanted another, DH didn't at first. I maybe wanted a 5th close in age but my last 2 pregnancies were full of problems with births at 31 and 30 weeks, so we're now done.
I'm the eldest of 4 girls, they were 6.5, 9 and 11 years younger than me which was always shit as I had no one close in age and it was always the 3 of them together and then me by myself. Also I got parentified all the time.
Cause of my experience I said all my kids would be close in age so that there isn't one person left out with a massive age gap. Obviously now there's a much bigger age gap between my 4th and the other 3 but I'm hoping it'll be different as she's the youngest rather than the eldest. She's also my 4 year old's only sister as the 2 eldest are boys, so most likely they'll still be close. My sister's don't have kids yet, they're 16, 18 and 21.
DH is one of 6 but his eldest sibling died so he's been one of 5 for ages now, he's the middle child. One of his sisters has 6 kids as well, one brother has 5, other sister has 2 and his brother doesn't have any yet, so it's a mix. Not sure how many kids DH would have had if I didn't want a lot of them, it was mostly all my idea.