A mate of mine who tells it how it is says he wants kids for when he's 50 years old. That's when you can go to the footy and have a beer with your child. When they start having children of their own. When you can have proper adult conversations with them.
I think the older you get the more important family becomes and while it can be difficult living with a newborn I couldn't imagine growing old without children around. A couple of years of no sleep is not so bad when you (hopefully) get 50+ years of enjoyment out of them.
The normal images of footy with the kids, a bit of harmless sleep deprivation you reckon is ok, helping them with the homework, etc - all are a bit "rose-coloured glasses".
In actual fact; kids are immensely rewarding in many ways, but are also a huge demand on you, and severe sleep deprivation is standard..
I have a 12, a 5, and a 2 year old, and just yesterday the 2 year woke me up with a yell at 3.15am - no reason; just a pain or a dream...4 mins to make sure she was ok and settled, but that was it for my sleep that night.
That will happen several nights a week.
I'm sure there are plenty of parents here in the same boat.
There is no real hard and fast pattern or routine; those who think they will have one are deluding themselves.
Not all families end up together, and even talking to each other as adults.
The really hard work to keep your family together needs to be done from day ONE, and worked on every-single-day until they are grown up and moved out of home...end then it still does not end.
But, I wouldn't go back.