I'll play:
Jack of all trades here, master of none. Basically just about every hobby or interest I have gained over my near 30 years of life involve tools in some way, shape, size or form (not gonna lie that's probably why I took an interest). Like you, I have an antique (1971) Sears Suburban 12hp mower (my avatar) with a deck, dozer blade and snowblower, and a couple of outboard motors that I admittedly haven't had much interest in working on lately, but I did amass a pretty full SAE kit for those and other types of projects.
I used to run a lawn/landscape company, did light home reno work, and maintained all my own equipment, using a mixture of SAE and metric tools there.
Basic maintenance on my car required the purchase of some specific tools (2015 VW Diesel SportWagen) to do some work there. I used to do more of my own maintenance on the car, but lately life just gets in the way so it's often easier to take it to someone for anything more than swapping winters and summers.
Boats - grew up around them and I love being on the water any chance I get. Learned all about engines and maintenance of wood on boats, lots of tool use as well.
More recently I've been more into woodworking, which requires a whole other set of tools, 3D printing (tools that require tools).