I am an old guy with no fashion sense without question.
In my career, I have to wear short waist coats and jackets so as to not inhibit access to my tool belt. I can not stand when I raise my arms above my head which I have to do often with work, and the waist of the coat or jacket I'm wearing raises up just under my 'moobs'.
Actually I hate the binding feeling of a coat or jacket so I typically wear a vest instead, especially when I'm working. Seldom do my arms get cold for as we all know, the heat is in the tools.
My chosen carry mode is using a Kangaroo Carry holster under a button up collared shirt. The vest just insures that I'm not printing, bonus!
After doing electrical work for more than 30 years, yeah.. I'd rather be fishing!