The first pistol I ever bought, in 1956 or so, was a .45 Colt SAA with a 5 1/2" barrel. TV cowboys shot 'em, so I bought one.
The only other caliber single actions I have ever owned were .357 Hammerli Virginian, and four 1875 Remmie types, two nickled and two blued, all with 7 1/2" barrels.
Of course that doesn't include maybe a dozen Bearcats when they were still cheap enough I could afford to buy one and throw it away when it wore out, or trade it off when I needed a few bucks.