I'm a hack of all trades. Too many "hobbies" for me; all of them important and not enough time for most of them:
musical composition (for about 40 years off and on)
fishing (all kinds, lately it's fly fishing for steelhead)
boat building (finishing up a 20 foot power dory for the fishing projects)
telescope building (ground my mirrors, used for astrophotography and observaton)
grape growing (now mostly table grapes, my little vineyard has finally come into production and gave us over 150 pounds of grapes)
electronics (rebuilt an old Baldwin organ, recently dug out and renovated a regenerative-signal short wave radio I made years ago)
playing with PIC microcontrollers (which was combined with the Baldwin organ project to make a midi controller)
Translating middle French theology works (working, slowly, on some neglected Pierre Viret works)
Plant breeding and seed saving
Back burner hobbies (things I was doing in the past but are on layover right now):
aerobatics (I used to fly a Citabria)
SCUBA diving (certified instructor since 1979)
Sailing (a homebuilt boat that did not survive a storm while tied to a bulkhead)
Plus, miscellaneous writing, reading, etc.
Time is always the limiting factor. I usually can fit in 2-4 hours an evening toward my projects, sometimes more. But my day job as a public defender and duties toward my church always take priority. At least I usually am happily tired at the end of the day.