In no particular order....
Cars...from old BMW's to 1960's muscle cars and Corvettes. I have spent tens of thousands of dollars on dozens of cars these past sixty years. So happy to have finally kicked THAT addiction.
The car hobby led to the desire to own a good array of Snap-On and MAC tools. Still have the tools. I REALLY enjoy having the right tool for the job.
Motorcycles. Have had several from the HD Cruisers, to dirt bikes , BMW's and a Ducatti Monster. Still have one Duc and two BMW's. Also toss in the myriad of clothing, bike luggage, GPS, etc involved.
Watches. Rolex, Omega, Fortis , etc. Down to three or four good ones.
Accurate rifles and truly well done hunting rifles. A whole other addiction as well as the optics that go on them.
Trap and skeet shooting. I've had three or four bad trapshooting addictions and a single SC/skeet issue in my life. Resulting in multiple shotgun purchases, loaders, ammo etc. Still have a single Ljutic, and a skeet set K-80. As well as a Spolar loader on my bench.
Quality optics. Own a few Leica, Swarovski and Zeiss bino's and spotting scopes. All of my rifles have Leupold optics.
Cameras. Been a photography nut for years. Untalented but I can appreciate the gear. Have a few old Nikon F's including my original from 1971. Will probably own a Hasselbad sometime soon.
Quality 1911's. Wilson, Ed Brown, etc.
Quality leather. El Paso Saddlery, Milt Sparks, etc. Have multiples for any and all of my pistols/revolvers. Toss in my custom set of Langlitz bike leathers too.
Bullet casting moulds. I have dozens. In my defense I DO use all of them. Simply can NOT sell them. STAR sizer and dies.
AR's/AK's and all the related Tacticool gear; supressors, Aimpoints, cases, dozens of mags, lots of ammo, etc.
Good Cigars. Have a nice collection residing in a 25-30 box capacity Staebell humidor in the gun room.
FN in MT