My favorite autos: understand, I only see two calibers 9mike and .45acp. They are available worldwide, chambered for almost every gun made, and chambered for most sub-guns. Ammo for pistols and subs are interchangeable. If you buy European ammo it's usually hotter than standard American fodder--it's designed for the subs. That said:
1. I have carried a Browning HP for over 40 years. My current "full" carry gun is an FM "Detective," which is a short-barreled HP. I use to knock hell out of the Argentine gun industry, when I was doing retail, but man, they have come a long way. This gun shoots as well as my high-dollar HP's (Practicals). For carry I load up with Geco BAT's. They will dispense with anything I am apt to meet.
2. The venerable Colt, but for me, in the "Officer's" model. I have two, a standard and a lightweight, both fully tricked out. I load up with hydra-shoks. They are as accurate as anything Colt has ever made and the lightweight is a comfortable all-day carry.
3. Gets a little sticky, here. I am beginning, what appears to be, a long-term relationship with a Kahr PM9. It's very small, easy to conceal, full time double-action, so no safety to worry about. I am right at the break-in on rounds fired--300. I'll knock it down and clean things up, then. My most accurate auto is my old Sig P210-6. These guns are amazing. They shoot groups at 50 yds that other autos wish they could shoot at 25. Smoothest trigger ever, out of the box. There are some drawbacks--rear sights are a bit flimsy. They are a little fussy about what they will eat. But, man, look out if you are downrange. They drive tacks.
Wheel-guns
1. The sheer power of it--the .454 Casull. If you are going somewhere that has dangerouse beasts (not men), this is the gun. In a Freedom Arms, you also have superb accuracy. Haven't shot any other .454.
2. Gotta have a .38 in a shortie, take your pick: J-frames-Model 60 S&W, Model 36, Model 12, or a....S&W; Colt Cobra, Diamondback, etc, or........... My current is an old Bodyguard (49) that I've had for 25 years or so--it's my bedside gun. The wife can handle it as well.
3. My favorite carry wheelie? I have a great little Bulldog Pug, by Charter, in .44 special. Mine has been converted to double-action. It is a small package with a big bite. IMHO a huge step up from a .38.