Clearly it'd be the "cool" factor for me, as there's certainly no advantage to a 32-bore over another gauge. Surely you'd be the only guy on the dove field with a 32 gauge, nobody'd be bumming shells; and just imagine all the great conversations a 32-bore would start before and after the shoot once you've demonstrated your incredible marksmanship. I see a 32 gauge as a great way to meet new shooters and make friends; and can't imagine a more interestng and fun gun gauge at the moment. I actually have a 32 gauge single shot "Captur" gun, but the chamber is a about 3/8" short for a standard length Fioochi shell so it remains unfired by yours truly.
Had my 14 gauge JN Scotts hammerless out the other day; nice tight gun that certainly retains lots of "cool" factor, but clearly ammo challenged. While tinkering I noticed a 16 gauge shell fit the chamber with only slight looseness, so I'm thinking of trying some low pressure 16 gauge loads in the gun; would I be an idiot?