Glock 21 my whole career. Don't have a choice it's what we get whether we like it or not. If I got to choose, I would go Glock 17 for the extra capacity.
A few changes on my BUG though, since we decide that.
-Kel tec p3at, still embarrassed I owned it. Sold it after a short period of use (or failures)
-s&w bodyguard 380