Here's mine, in order of what takes up most of my "spare time"
Competitive BMX (bicycle motocross) racing with my 14 yo son
-great sport with a camaraderie similar to diving
I share many others' passion for automobiles, both restorations and enjoying modern technology: '98 Mustang Cobra convertible, '76 Triumph Bonneville motorcycle, '65 Volvo P1800, and (hopefully soon) a late 40's-early 50's pick-up.
Frustrated semi-professional musician
-have been in bands that actually got paid money to do something I love, write original music, etc. Now semi-retired, but sit in with lots of other bands when the opportunity presents...
Extreme snow-skiing
-including lots of out of bounds, ungroomed mountain terrain and one incredible week-long adventurei in the Andes!
Pick up games of basketball and tennis and washers.
Scuba Legs
PS Great thread! Very interesting to read.