I have had nothing but good luck with:
Beretta (92fs, 21A Bobcat)
Ruger ( two MKIIs, two Speed Sixes, Mini 14, P89, P95)
CZ (two 452s, 70)
S&W (M-19, M-36, M-63, M-17,M-586, M-27, 59)
Colt (Comander .45)
SIG (220)
Mossberg (500)
Remington (870)
Winchester (1300)
Charter Arms (Off Duty)
Walther (PP .32acp)
I have had some minor problems with most of my guns but they were easily fixed or fixed themself or I have not shot them enough to know.
I have had really bad and often repeat problems with certain guns and even out of these guns, there are only four companies that I would never buy from again. I don't just have one small problem and decide to never buy from a certain gun maker again, I just think some gun companies are not worth the risk.
Really bad guns that I have owned:
Ruger 10/22
Remington Nylon 77
Jennings J-22
Taurus PT-22
Kel-Tec P-32
Tec-9
The last four gun companies will never see another penny from me. Those last four guns are the worst I have ever owned and I have owned LOTS in my life.