What I carry, depends on the time of year, weather, and the clothing I'm wearing.
This time of year with a jacket, coat, or some other heavier outer garment, I carry my FAVORITE PISTOL OF ALL TIME: 1989 SigSauer P220. 45acp. No finer gun or caliber out there. "CROSSBREED Holster"
When I'm not wearing a coat or outer jacker, and simply have an outer shirt to cover up the pistol, I carry my Kel-tec P11 9mm. Very decent pistol "Crossbreed Hoster".
When the weather is warm, when carrying a holster isn't practical, when wearing a suit, tux, etc... I carry my trusty AMT 380 Backup in one of my pockets. "no holster"