When I departed from CB I remember was the term "handle" being used but not first personal - in fact had I heard someone use that term it would have taken a bit to figure out what was meant....... Nowadays I hear folks on the ham band use "handle" somewhat "the handle here is..". We have our own terminology why use another?......
If I remember correctly, the term 'handle' was used by ham operators years ago, and was hyjacked by the 11 meter crowd. THAT made it distastful to ham operators who stopped using it except for a few holdouts.
I agree with the people who dislike the 'frequency police' and their often done habit of correcting others--while breaking the rules themselves.