I like buying older custom/modified guns, revolvers and autos, that are representative of the way handguns were individualized for carry before the factories were making every configuration under the sun. While I prefer guns that were built by name 'smiths or shops, I will take a chance on something worked over by an unknown source if the price is right and the gun strikes my fancy. I also have factory original guns modified to meet my needs/desires.
Here's a few of my favorite revolvers-
This is a S&W 25-2 .45ACP built by Austin Behlert around 1980 before S&W saw the light and started making their own large frame snubbies. It started life with a 6" barrel and square grip frame.
This one is a S&W 28-2 Highway Patrolman that was customized for an IL LEO by Marc Krebs around 1987. Originally a 6", square butt, .357mag, it received many mods and custom touches, including being converted to .45ACP using an M25 barrel and cylinder, and having the grip frame round butted. Called the "CROWBAR", the custom grips have ivory inserts with little crowbars scrimshawed into them.
Mag-na-port built 250 of these custom Charter Arms Bulldog .44spls in the late '70s and called it the "BACKPACKER", mine is #128. Interestingly, one was pictured on the cover of Mag-na-port Catalog No. 1 but did not receive a mention in the catalog itself. They took a standard 3" Bulldog and, among other mods, cut and ported the barrel, bobbed the hammer, and hard chromed it. It's a terrific gun for "up close and personal" use.
No idea who did the work on this S&W 1937/1917 Brazilian .45ACP but they knew what they were doing and took their time. The barrel was cut to slightly over 3" and nicely crowned, the front replaced, the hammer was bobbed and serrated so it could still be cocked and lowered safely, and the action smoothed. A great example of a big revolver modified for carry/self defense back when the wheel gun was king.