In backwards history...Today, I carried a Walther PPK/S .380 (FMJ) in a Galco shoulder holster (trip to town). Yesterday, I carried a NAA .22lr mini (Yellow Jackets) to my eye doctor visit (don't tell anyone). Monday, I carried a Ruger .357 LCR (stoked with LSWCHP .38 +P) in my right front Wranglers pocket to the grocery store. Sunday, I carried a Diamondback DB380 (FMJ) in a Galco ankle lite holster (to church...don't tell anyone). Saturday, I carried a P64 (FMJ) in a Russian leather shoulder holster... and so on.
I'm not bragging about the selection of guns I own/carry. I'm just saying that in my "silver years", I have options that I have acquired over the years.
In the morning, I look at the calendar, get dressed, then find something that fits.
If I could only have one handgun, it would be a .38/.357 snub nose revolver (no safety, no magazine, just squeeze the trigger).
If I could only have one pistol, it would be a cold war 9x18 (FMJ)...RELIABILITY, ACCURACY and SIMPLICITY trumps caliber and manufacturer.
If I had to choose one irrespective of concealed carry restrictions, It would be my Ruger .357 SAA Blackhawk...but that's hard to conceal in church, the Dr's office, McDonalds, etc. What a sweet shooter.
I spent 20+ years in the USMC and swore by the .45, but now it's all about reliability, shot placement and penetration...not about caliber nor round capacity.
I prefer all steel weapons. I prefer simplicity over hype. Thus, American revolvers and Soviet steel jump to the top of my list. But, sometimes an itty-bitty polymer pistols have their place (DB380...which has been 100% reliable for me).
Carry what you can conceal for the occasion...then, get proficient with it...then carry...ALWAYS.