I don't know; perhaps I've just been lucky.
But to those who say "No" to Ruger, I've owned a P89 and a BP Old Army. Both were very accurate and extremely reliable. In fact, the P89 was the most reliable semi-auto I've ever owned, since it never once jammed or misfed in perhaps 2000 rounds of the cheapest practice ammo possible -- as well as the +P rounds I used when carrying. But I sold it because I never could master the trigger when shooting off the bench combat style. Oh, I guess my results were sufficient, since they were invariably between a six and eight inch circle for fifty rounds at ten yards, but they were never good enough to make me feel good about them.
I still have the Old Army, and loaded with 30 grains of black powder it is one of the most accurate handguns I've ever fired out to 25 yards. In fact, just for the fun of it, I want to take it to the fifty yard range something during the next few weeks.
To those who say "No" to Taurus, I've owned a Taurus .22 lightweight revolver, a Taurus PT-22, and a Taurus PT-99. With factory magazines, the PT-99 has been nearly as reliable as the Ruger. The only ammo it didn't like was Sellor and Belloit. The PT-22 was consistently reliable for about 200 rounds, and then it began having problems until it was cleaned. The .22 snubbie, which I bought to use for training my wife how to shoot, had a fine DA trigger and a superb SA trigger out of the box. It had great accuracy for a 2" barrel and was as reliable as any revolver is supposed to be. I sold the PT-22 and the revolver (because my wife never did get interested, despite my repeated attempts) for new toys. I'm trying to sell the Taurus only because a Kimber has replaced it as my carry weapon.
To those who say "No" to Kimber, my current carry gun is a Kimber CDP Pro (4" barrel). It has been more magazine specific than any other semi-auto I've owned, but with factory magazines and the right aftermarket magazine (1 out of 4 Metalform) it has 100% reliability. I can shoot more accurately with it at 25 yards than with any other semi-auto I've ever owned, including the Taurus. It's not that the Kimber is more accurate (it probably isn't), but the SA trigger makes it far easier to control for me.
In fact, about the only gun I would never buy again was an RG-63 .38 special purchased in 1975 when I was still too ignorant to know better. It was so inaccurate I couldn't keep shots on an 8x10 sheet of paper at 25 feet, and lost so much power that it couldn't break an old-style coke bottle at five feet (the slug bounced off). That revolver was good only for one thing -- it utterly deflated the ego of any shooter who had pretensions of being a good shot. Luckily, they don't make these junkers any longer, though I guess some are still floating around in pawn shops.