I had the misfortune of being born on Halloween while at the same time getting the gene that disdains dressing up. More precisely I was 57 last birthday and I included my age in my post as I get tired of being told by strangers ( usual young bucks with strong opinions and not much knowledge) online that I am an idiot. I have been told that in person much of my life, and those people now express many regrets about the passage of time while I find myself enjoying the freedom of mind that comes with having ridden unsuitable motorcycles up to the edge and not having fallen into the precipice.
I find the secret of youth comes in three parts, a strong generic inheritance is critical for happiness, it's hard to be joyful with chronic pain. Curiosity is a strong component of happy aging, and lots of good memories to fall back on are a reminder that you can and should take risks: fear of desire is crippling to happy aging.
In my avatar I was riding in California when there was no helmet law, after crossing the US and Mexico on a P200. A classic unsuitable bike for a stupid trip. No regrets at all.