@alwaystiredneversleeping
It's entirely up to you, but it would be a huge NO from me. Been there done that, loved every minute of my kids, and would never change a thing, but I would not want to to it all again. All those years of drudgery, struggling financially, school gate mafia, childcare, school politics, chasing your tail trying to appease your kids with all their hobbies and interests, and running yourself ragged after work to take them here there and everywhere, and never being able to put yourself first.
And don't even get me STARTED on the 4-5 years of sleep deprivation me and DH had. Not only when they were babies, but the fact that they were still getting up at 5am-ish at 3-4 years old! 
As I said, I love my kids, and if I could go back 25 years in time, I would still have them IYSWIM.
But I can't pretend it's been easy, because it hasn't. It's amazing now, and I love the relationships we have with our independent adult children with their successful careers. But I have no desire to do it all over again!
So, as I said, it's a no from me. Now me and DH are in our 40's, our kids have left, and we can do what we want, when we want, and go on holidays abroad, long weekends away etc etc, and not have to worry about anything.
Starting again at 35-40. Not for me. Nor DH. We love our life as it is now.
Sorry OP. You did ask!
I am also curious as to why you have your username OP. Do you REALLY wanna start over again??? (If you are 'always tired, never sleeping?')