I carry a Glock 19 off duty.
I'm with Kodiak... I intend to get a Kahr PM this year for a backup/off-duty gun.
FYI, most feed problems with the Glocks are due to the magazine spring, not the gun or the ammo. Especially if they bear a weapon mounted light. I have shot over 200 rounds through my 19 and had no failures, except when firing lead (which the manufacture expressly says not to do). High end, low end, reloads, didn't matter. I've shot innumerable rounds through duty Glocks over the last ten years and never had any problems.