Marine and movie model collector. I have a movie replica of Orca, and two Titanics I’ll be working on. One is 4.5 feet, the other is 6.3 feet long. Bruce the shark museum quality replica.
Into cars too. My princess 1976 Monte Carlo 400 ($20k in drivetrain alone) and my 2010 Dodge Challenger SRT8.
Other than that I work as a dealership mechanic ALL the time. Can that be considered a hobby?