I don't often any more in the city. Nowadays, the times that I open carry, it's the Kimber 1911. For concealed carry, it's the same and/or a S&W Model 340PD AirLite .357 Magnum, though. That one stays concealed even when the Kimber is out in the open. So, I guess you could really say I am sometimes carrying a revolver at the times that I am open-carrying!
In the rural areas, which is fairly often in my many travels, my preferred piece is still my Ruger Vaquero .45 Colt (7-1/2"), usually open carried in either a tight (not sagging) cartridge loop belt and holster or a Safariland vertical shoulder holster (from back when they still made real leather.)
Many years ago, my primary open and concealed carry piece was a S&W Model 19-7 from the Performance Center, called a K-Comp. 3" heavy ported barrel with compensator and SMOOTH trigger.
I rarely carry extra ammunition on my person. There's an entire debate there.