Hobbies that I've had/have/will probably have again are:
photography
drumming
singing
weightlifting (more for muscle, not for max poundages)
mountain biking
boogieboarding
scale model car collecting
scale model airplanes
flight simulation
the stock market (I like studying it)
detailing cars
sports cars
aviation
r/c helicopters
drawing
replica air guns (I have .177 bb gun replicas of a 357 magnum, colt 1911 and russian AK-74u)