I'll finish my ninth year next week. In rough order, I have carried the following:
Glock 19 Gen 2
Glock 22 Gen 3
Glock 23 Gen 3
Kimber TLE/RL II
Sig P226 9MM
Glock 21SF Gen 3
Browing Hi-Power (Yost Custom)
Glock 22 RTF2
I switched back and forth between the G23 and 1911s quite a bit for a while in there. Probably carried a G23 for three years and a 1911 for just a hair longer. Currently mandated to carry the G22 RTF2 at the new gig. Have never shot the full size Glock 9/40 frame well, so would greatly prefer even just the ability to carry the 23 or a personally owned Gen 4, but alas I don't think that's happening any time soon.
I've also carried the following BUGs:
Smith and Wesson 642
Currently using the 642 as an on-duty backup and the LCP as off-duty backup.
"Logic is rarely the engine that propels a police department forward."
-David Simon in "Homicide"