> I was never especially fond of kids, but it turns I out love my own more than I imagined possible, and have more fun with them I ever thought I would!

That's because we're designed to have kids.

I for a change am happy I had my kids in late 30s / 40. I am certainly wiser, way more experienced with world, humans, got to be successful and in much better financial position which also helped my parents to have better retirement.

I wasn't a full adult in my 20s, too naive, too trusting, undefined for the lack of better words, not experienced with various types of women (laugh all you want, this was probably the most important experience from all for me, it afterwards formed my choice of wife which is often the most important choice in one's life).

Plus I've managed in a decade before having kids to travel the world backpacking, various experiences that changed me for the better and basically reinvented myself, on my own. I don't come from competitive or nurturing environment, nobody expected anything from me. I've found my passions in various mountain/extreme sports. None of that would happen if I had kids earlier, thats very clear when looking at peers who took the other trajectory.

If my kids will have their kids young or older is completely up to them, I find it selfish to push any expectations on them, they (will) live vastly different life compared to me, I can just respect their choices and love them regardless.