A family of hobbies
Musical
Music is the family with the steepest early cost. Nothing sounds good for months, and the practice is audible to everyone in the house.
It is also the one whose progress is impossible to fake and impossible to lose entirely — an instrument left for a decade comes back faster than it was first learned.
Hobbies in this family
2 of 2 written so far
Playing instruments
The long apprenticeship, and the first evening it stops being work.
Composing
Writing the thing rather than performing somebody else's.
Not sure which family you belong to? Start with what a hobby is.