Science Fiction from late childhood to middle age. I firmly believe it kept me away from the drugs all my friends were doing when I was a teen.
Photography- I was a pro and taught it in the '70's- just dabble now.
Audiophile all my adult life, building some of the equipment.
Gas powered model aircraft- in my youth and early adult life.
For about 6 yrs I was heavily into fresh water aquariums, breeding and selling different kinds of fish.
And now The Bike.