Not dedicating my entire life to work.
When I was 24 I had a random breakdown. Came home from a completely normal, unexciting day of work, got some food out for dinner and out of nowhere just collapsed and cried. Was life really just work and distractions until the next day?
I spent a year making changes to my life. From diet to perspectives until I found an opportunity to travel. I gathered all my money, even withdrawing from my stocks I had lost half my money from due to the 2008 recession, and fucked right off. I was able to backpack around and lived in a couple countries for a few years.
I had so many experiences that it felt like I grew as an individual exponentially faster compared to all my friends and family back home. I'm happy I chose to live life for myself but I also recognize that I was in a position to do something that most people are not able to do. That's why I don't talk about it too much unless there's some relevancy to the current the conversation.
Had I stayed and spent my entire life working, I'd be a miserable old man that worked my body until it was broken only to have retired tired and in pain. I would have been unable to actually enjoy the life I would have worked so hard towards.
Other people seem to be concerned for my retirement with so little money saved. I'm not worried. My retirement plan is extreme sports. Whatever happens, happens. I lived a life on my own terms.