All are fun
I find that often the target creates the fun factor, regardless of what you are firing.
Reactive targets are fun, golf balls are a hoot. Bowling pins.
Years ago one of our group of shooters tuned and moved pianos for a living. Not all piano tuners are blind. He would get at least one piano a year that simply could not be tuned. We would haul it out to the desert, and basically turn it in to kindling with pistols and rifles. Huge fun.
Enough fun that it made the cleanup after very worth it. We would always leave the spot better than we found it, sometimes that was a real chore as not all shooters who used that spot shared that responsibility.