To print. My favorite to print! (“Curse your sudden but inevitable betrayal! Ahahahah!”)
Although for testing new filaments, I usually go with a small egg-shaped spiral printed glue pot (or paint pot or small parts holders,) small things, I feel like spiral prints show flaws, as well as layer adhesion issues.
I use the microswiss hardened nozzles they last well enough for the price points. unless you're going to go up to the ruby tipped nozzles, they're still going to wear out with just about any of the abrasive filaments.
I recently tried some dual-color silk filament. Half the filament is one color, half is another color. It makes cool looking parts that are different colors on each side.
(I mean, that’s the joke, right? I do play…. Even when no one is around. Actually? Helps me focus; gives my mind a rest from problems for a minute, if that makes sense.)