Back in my teaching days, I asked high school students in a writing course to write down the ideal age of life (12? 21? 35? 65?). Students had to present reasons for their choice. Most chose an age older than they were at the time. A solid minority chose an age they had already passed. Why? Hardly any decisions to make; no chores; plenty of playtime
Over time that led me to consider not the ideal age of life but the age at which most adults have settled in to their worldview, to commitments in relationships, and to handling stuff: money, property, environment. That age seemed to be 35. In today’s culture, with more than one sociologist claiming that young adults are unsure of jobs, relationships, church, residence, etc., often as late as 30, maybe the settling in comes a bit past 35.