Interesting post and interesting common hobbies. I guess we're all wannabe scientist tinkerers at heart.
In no particular order, the hobbies I on which have spent more than $1000 or 100 hours (something has to be a qualifier to be a "Hobby")
Bonsai
Camping (traditional and survival)
Climbing
Fishing
Hunting (birds these days, larger game when I was younger)/Collecting projectile launchers in general
Working/Tanning Hides
Sewing
Mountain Biking
Paintball (Woodsball, Scenario)
Water Polo
Scuba Diving
White Water Rafting/Kayaking
Surfing (I can stand at least)
Snow Skiing
Snow Boarding
Skydiving
Bungee Jumping
Roller Coasters
Gaming: NES, SNES, Nintendo 64, Wii, Wii U, PS, PS2, PS3, XBOX 360, Atari 2600, PC, and Android platforms currently operating.
Theater/Improv Comedy
Disc Golf
Volleyball
Golf (terrible)
Bowling (also terrible)
Off Roading
Carpentry
Landscaping.
Geocaching
Wrangling my two sons.
My name is Herbie and I have Hobby ADD.