I still hold a bit of the childish passion in even at forty. I just like moving a lot and doing things minimalistically (is that a term ?). Monk life is neat IMO to an extent.
It's weird, as I'd absolutely love to live as a monk full time. The training, the studying, everything about it. Like, if I ever reach financial independence and don't get married/have kids...that's definitely what I'm going to be aiming for.