Other then my issued duty pistol, an H&K USP2000 in .40 S&W my most often carried handguns off-duty include the following:
top, my favorite; a David Sams, Sam's Custom Gunworks overhauled Colt .45 acp Combat Commander and an FNP-45. Although the FNP is a beast, it is a great shooting hi-cap gun:
Very first shots out of the box...
Nothing says oops like 30 rounds of 5.56 guided to the target by an Eotech.
My most often carried off-duty hand guns (except the Oly OA93), Model 36, Colt Agent, Model 38, and a Detonics MkVI Professional .45.