Glocks are my all time favorite handguns, and 9mm is the only caliber I shoot. I've owned 1911s, .40 cal handguns, and I despise shooting those calibers as opposed to 9mm. I've owned dozens of different 9mm handguns, and some magnum revolvers, and for my money my Glock 19 beats them all.
I can pick up any Glock on the planet at any caliber and shoot it exactly the same way. I love that uniformity in a weapon.