Some of my favorite holsters are OWB, designed to be worn with a belt. As much as I like them, there are a lot of days that I don't wear a belt. On top of the belt requirement, if you plan to carry concealed, you'll have to keep a jacket on. Wearing a sportcoat or suit coat is an everyday thing for me.
Author with OWB Holsters
When it comes to choosing a favorite holster, I'm really hard pressed. It depends on which gun I'm carrying and what clothing I'm wearing. That old Bucheimer holster for my Colt Cobra is a half-century old and I love it as much today as I did in the 1970s! Now, my Cobra is nickel but if it were blue, I might not like the loose fit it exhibits after so many years of use.
My MOS when I served in the United States Army was 76Y. For you non-military readers, the Military Occupational Specialty of 76 Yankee means that I was a Unit Armorer. While on REFORGER 85, I trained with German Paratroopers and qualified as "Expert" with the German G-3 rifle, the Israeli Uzi 9mm sub-machinegun and the 9mm handgun.