Hey Whitey!!! Woof! Good to hear from you, buddy!
I use the G19 for the last ten years now. Found it to be the “just right” size for SoB, hip, or shoulder rig. Plus it’s a good fit to the hand. Plus, when I’m teaching, I’ve found that it SEEMS to be the easiest to handle for most people.
I have a G17 also, AND a G21 in .45ACP (American Commie Popper). They’re larger and bulkier.
Then I realized that kind of "accidental discharge" usually happens only to those old enough or careless enough to experience all kinds of accidental discharges...at which point I sold my boat, and bought more Glocks.
I've used a number of different shapes and sizes for daily carry, but the bigger Glocks go with me, in a chest holster, when I head into the hills, where you might encounter two- and four-legged predators.
Dig the weight, feel, reliability, accuracy.