Teens, Twenties, Thirties, Forties and up? When was the best time for you, and the worst (thus far)?

In two weeks I’ll be turning 37. The big 4 0 only a few years away. I truly feel younger and have been told by many that I look 10 years younger, but, still..

Probably the best time for me was during my mid twenties. Just starting out, but, I was pretty enthusiastic with tons of energy, lots of goals and loved the challenge of being on my own and making a life (career) for myself.