Ive got a Glock 17 with an honset 60000 rounds through it, and the only stoppages Ive had, were either intentionally induced with snap caps, or a couple of reloads that had primer issues. Other than that, its like the Energizer Bunny.
I also have a 26 thats got over 20000 rounds through it, with basically the same results.
Actually, out of the 14 Glocks Ive owned, I only ever had trouble with an 80's era Gen 1.
My 17 SIG's, and 6 HK's, worked like the Glocks, and were pretty boring too, if you think stoppages are exciting.
Aggravation wise, my 1911's were the worst of the lot. Over the years, Ive owned close to 40 of them, and the Colts and GI guns were the only ones I ever trusted to put in a holster. With a "reliability package" done, they pretty much ran like the Glocks, SIG's, and HK's. The Springfields and Kimbers were the worst of them, and the most trouble and aggravation.