I know what you mean about leaving hedonism & adventure behind. Through biological evolution our brains have evolved to be long-term happy if you settle down and raise a family? (Source: random comment on hacker news that clicked for me)
This family thing, especially with children, is a gamble and You can get unimaginable bad cards and there are no take backs. I may be skewed a bit because most people that I know become so unbearably unhappy after starting family that You would never want to spend time with them. For some it resolved itself (after children grow up and left home) and for some it destroyed their life.
people think they're lucky
https://www.youtube.com/watch?v=e-or_D-qNqM
Right?
Me I'm aiming towards harmony with my life free of unnecessary suffering simultaneous with the same thing for my family.