1.
Looks matter. I don't care if nobody else sees it, but I have to see it, and I prefer the looks of traditional blued steel and fancy grips over the plastic bricks of most modern semi-automatics.
2.
Simplicity of controls. A Centennial revolver has one primary control, the trigger. Even someone who has never handled a gun before will instantly understand how it works. There are no safeties (does this one go up or down to fire?), slide releases, decockers, loaded chamber indicators, cocked indicators, or other levers sticking out all over the place.
3.
It can be easily customized. Turning one screw allows even someone with no gunsmithing ability to change the looks and shape of the gun by adding new grips. The grips can be exchanged for ones that are smaller, larger, rougher, smoother, stickier, more slippery, or just plain prettier.
4.
Will fire any ammo. There is no need to find ammo that works well with your particular gun. As long as it fits in the chamber, you can fire pretty much anything from weak target loads to wrist-breaking +p+, and in any bullet profile from pointy to flat.
5.
You don't have to carry the weight of superfluous ammunition.
Unless you routinely run up against al Qaida or Mexican cartels, you don't need a semi-automatic with 16 rounds at your disposal. 5 or 6 shots will be plenty enough to put adequate distance between you and whatever is chasing you.
6.
Live cartridges don't leave the place you put them and hide elsewhere in the gun. It is obvious to the user, even if tired or stressed, whether a revolver is loaded or unloaded. Cartridges stay in the cylinder until you take them out, unlike a semi-automatic, where one must remember to remove the magazine and check the chamber (and in that order).
7.
No magazine release to accidentally engage. Its just about impossible to accidentally release a cylinder, and would be blindingly obvious to the user if it could happen.
8.
Looong, heavy trigger pull prevents accidents. Shooting yourself while reholstering is called "Glock leg" not "revolver leg," and there is a reason for that.
