I got my first Glock back in 1987 when they only made one model, the smooth frame G17. I was working at a commercial ammunition remanufacturer (while in college) and was able to shoot up all the blemished ammo I wanted for free. This was ammo that was shootable, but we wouldn't sell it and they were happy to have me shoot it up to get the brass back into rotation. Our main customer was LAPD and we were loading 700,000 rounds of .38 special practice ammo a month. This resulted in lots of blems and I was shooting at least 800 rounds a week.
When LAPD transitioned to the Beretta, we started loading their 9mm training ammo which meant that we started accumulating blem 9mm ammo. I didn't have a 9mm and figured I needed to get one to shoot up that ammo also. I wanted something I could shoot up a bunch of ammo without taking too much time cleaning or taking care of it. I didn't know much about them but I decided to try out one of the "new fangled Glocks" and since they were cheap back then (the shop had an FFL and I got guns at cost) I figured why not.
So, I shot the crap out of that thing (thousands of rounds) and never cleaned/lubed it, just abused it for a few years without any problems. Two things happened during this time. I got real good shooting the Glock platform and I discovered how much abuse they could take and keep going. That made an impression on me and throughout the years I have continued to shoot them and have acquired a bunch of them.
I know they are not for everyone, and I don't take it personally when people say they hate them, or they think another handgun is better. I have lots of handguns that are much nicer and may shoot better but I can't (or wont) treat them like I do Glocks so they have their place.