I hate being pigeon holed. But I've long known that my reasoning is unconventional on many gun topics.
I carry a 1911 because I shoot it well and it's narrower than a double stack nine. Confidence does matter. I carry in .45 because my .45 1911 is parkerized and that's more tolerant of being IWB than the blued .38 Super. I actually prefer the .38 Super to .45...
I have on occasion carried my Glock 21, but that sucker so damn wide it just doesn't ride well for me.
With modern ammo there's just not much difference 'tween 9mm and .45. Carrying more shots is better than fewer, but everything is a compromise. I carry a spare magazine or two to compensate. The flat-narrow 1911 mags are a plus here too.
If .45 kills the soul, do they pass harmlessly through gingers?