Ask me today what my favorite Glock is and I'll tell you it is the Glock 21. I've owned and used the G22, the G30, the G17, G19, G26 but I keep returning to the G21 as the Glock, for me, which is Glock Perfection.
Here's a video of the G21 in action. I was not having the best of days, but...well, see for yourself..still pretty pleased. Getting decent "kill shots" in from 42 yards out on a human torso target, three shots hitting within a couple inches of one another is sure good enough for me.