Well I've recently gone all-in for Hyperborea 3e, OSE, Savage Pathfinder, and a few other Kickstarters, as well as collecting all The Enemy Within campaign and companion books. Plus a ton of minis. And buying stuff to help run on VTTs.Same. I think it's a good thing I haven't been going crazy with my spending money recently.
My spending is pretty big, but gaming is the primary hobby I spend money on.
For me, it's physical space and brain space: learning new systems, collecting games I may never play (looking at you, Forbidden Lands).