Glock- G-17 and G-19 (and seems like the G-26 too) run as reliably as anything ever built. HOWEVER ; I just don't feel that comfortable in off duty type situations where the gun is not in a hooded and protected holster, even then watch the reholster ! I carried a Glock 17 from the 80s and the 26 was my last BUG in LE use. The triggers are never anything to write home about and neither are the sights.
Beretta M-9 : Seem to run about as well as a Glock (better with the heavier or oddly shaped loads) but bigger and heavier. The DA lets the gun be carried in an uber safe mode yet gets into action quickly. Giant handy ejection port.Can be made to have a good DA trigger and great SA trigger. The sights can be up graded too with good results. Big tho compared to a Glock but mine is a first choice if I had to go into a war type scenario,Aluma gripped,LPA sighted and accurized it is loaded and holstered with 20 spare mags on a vest .
CZ-75: Super accurate, reliable (at least my P01 is) , compact and feels good. Not that great a trigger in either DA or SA but can be made useable.Sights up gradeable as are grips all with moderate difficulty. But a sexy compact tack driver with wonderful ergos and a small ejection port. My P01 is under my bed, sort of, loaded with 15 127 grain +p+ Rangers and with a light on it.
Browning Hi-Power: My favorite of the bunch: a superb trigger is easily had and is fast into action carried cocked and loktd which doesn't scare me like a Glock does.Just a fast damn bullet hose and carried in a speedy holster is a top (minor caliber) gunfighting pistol IMHO. Good sights are obtainable but I use the factory sights well, Novak does a great job on these. BHPs are really a great pistol IMHO, even if the ejection port is a little small.