I agree with the age 47 average. I'm 50 now and just starting to come out of my funk. And I have a good life, good wife (no divorce), good kids, and a good job. Really nothing to complain about yet I was still miserable for the last few years. I didn't read the article, but I'm guessing peak unhappiness coincides with slowing down, ageing issues, lack of testosterone, lack of drive, etc.