Glock does kind of have a reputation as a low-end plastic Walmart gun. I doubt Counter-Strike is causing that reputation, but it certainly isn't helping
It also has a reputation of being one of the most reliable, simplistic and easy to use/maintain guns used by military and law enforcement around the world. So much so that other highly reliable Striker Fire handguns all basically cloned the Glock design (Smith & Wesson's M&P line, among others).
I'd bet there's influence coming from both ends - those who used them in video games and decided their first gun just couldn't possibly be a Glock, and those who see Special Operations guys using them and decided their first gun just had to be a Glock.
Yea I was gonna say, most real gun owners understand that reliability, recognizability and using ammo that's very common and available trump anything else. Glock 9mm is always a good choice.
