I enjoy a particular 16 ga. lady (Susie) on the late season dove fields, but only because it is so pretty and handles so well (and knocks down very high birds with it's tight chokes). I agree that 16 ga. shells are harder to find, but I have no trouble keeping plenty to shoot without reloading. I reload every other gauge I own, but don't use the 16 enough to justify a loader and all the other necessities.
What I find funny is that so many pooh-pooh the 16, purportedly because of ammo scarcity, and recommend at the drop of a hat that someone not hesitate to buy a 2 1/2" twelve ga. gun. Ammo is no more scarce for the 16 than the 2 1/2" twelve. In fact, it is much easier to find in the boonies.
SRH