Pat, could you define your term "pot bunker" for us? Do you view this as a function of merely circumference or diameter of the sand area? Or, do you see this as also including the surrounds of a "pot" as being stacked sod wall, or just rough or FW cut sod slopes surrounding the pot of sand. How big does the round bunker have to get before it is not a pot, IYO. Of course the influence of the slope of turf around the pot is significant as to how it plays in the strategy and how deep it is to collect down into the smallish sand pot from a much greater surrounding depression of turf.
I think my favorites are the smallish sand pots of about 4-6' diameter that have FW cut or rough or intermediate cut for a good number of feet surrounding them and the pot itself is only 12 inches to 18" deep. 12 at Rustic Canyon comes to mind, as does the greenside one at 18th Bayside in NE, or the smallish one at 17 BlackWolf Run. But, there are so many. I can't think off hand at a true smallish stacked sod pot I've played that I've been in, that fits my idea of a true pot bunker. Maybe one at Arcadia Bluffs, but not specifically one I can think of.
But, there isn't a better description than Darwin's of a pot bunker, "with just enough room for one angry man and his mashie".