A question that's been bugging me for two decades.
Once on a tower visit I heard a controller griping about a pilot who got his panties in a wad and stopped responding to the controller because the controller kept calling his "Archer" a "Cherokee." [Yes, I get that all Archers, Warriers, Dakotas, etc. are all type certificated Cherokees, that's not the point.]
My question is, is there an approved list of what callsigns are used for each make and model of aircraft somewhere? If not, who decides what call sign an aircraft should use?