Apart from the car stuff....
PS3 gaming.
Model making ~ all types: cars, engines, rockets, r/c etc.
Exercising ~ weight lifting mainly (nothing like your set up though Andy ~ just an exercise bike for warming up/cardio & dumb bells/barbell).
DIY.
Knife collecting/making ~ not so much nowadays.
Shooting ~ airguns/airsoft but again not so much nowadays.
Archery ~ compound bow shooting.
Walking (if you can call that a hobby ).