Shotguns are fun because you can get weird ammo.
A friend gave me a big bag of 12-ga rounds loaded with rice. There are incendiary rounds available and tracers and weird sabot slugs. I don't currently own a shotty because my 870 failed catastrophically and I elected to replace it with an AR.
Shotguns do have a lot of fun rounds, I actually have looked at a lot of weird slug shell videos waiting for a trade to do whatever.
As I am with trading futures, I am/was I guess with guns, I don't get bogged down with variety and get very good with what I have and make do when it is less than optimal.
Too many choices brings unhappiness.