I use mine for both functional and dress-up parts for rocketry, repair parts for all kinds of things, utility items I don't have around (box for micro drill bits, under-desk mount that turns USB extensions into desk-mount USB outlets, fan mount to de-smoke a stinky guitar I bought used), my own tool designs, replacement knobs for things that haven't been made in decades, fidget spinners for the kids, any kind of maker part I need, electronics enclosures, stuff i don't want to go to the hardware store for, tons of stuff.
One of the keys is to learn CAD. If you're unwilling to do so, you're stuck with what you can find on Yeggi.
Myself, I've never understood the mania for printing figurines with FDM (resin printers at least do a creditable job with them), but my wife loves those (and has her own filament loader for the printer, with her preferred materials).
I had a friend who heard I had a 3D printer say "so, I guess you just print a bunch of Benchys?", and I was baffled. I don't know whether that represents a failure of imagination, or we're just different types of makers and tinkerers.
Once I got competent at printing, it became a go-to tool for consideration in any unsolved problem.