Late teens was a great time for me, but I'm chiming in with the other that say now is the best time of my life.
I recently turned 43 and I'm enjoying all the experience I've gotten over the years and I'm finally learning to relax a bit.
My twenties and 30's were my toughest years because I was raising my son on my own and had tons of unnessary obsticles in my way along the way.
Now that he's grown, I'm enjoying every little taste of freedom I now have and it it tastes great
It was the 70's when I was in my teens, so that explains the good times