Without reading the thread, I'm gonna say adulthood.
Childhood was fun and everything was fresh and new. Adulthood is when life became whatever I made it and I'm pretty happy with it.
The only thing I really miss about childhood are some of the people I loved that are no longer here. If I could go back, I wouldn't even be able to enjoy it because I know too much, now. My only worry about adulthood is my daughter and if she is happy or will be happy.
At 43 years old, I vote "adulthood" and it's not even close.