Printed Solid Jessie filament has become most of my stash, its mid-priced filament that prints like premium. I use PLA for most stuff and PETG if its going to get sun or if PLA would be too brittle. I also use some flexibles (TPU) but each printer is different in how it handles soft filaments, so its hard to recommend.

If you experiment with other types of filaments, be sure your plate can handle it. PETG will stick too well to some plate coatings. Prusa has a good matrix to help.