I was taught in the military (Navy ground based crash waggons, mobile units etc) some 40yrs ago at the age of ~18-20.
I started PPL last July at the age of 67 & I still cannot get the "over" bit out of my thick skull. Niether can my wife who was in air traffic at the same time. One of our ATC persons tells me they just think we are all ex Lancaster pilots! I have passed the FRTOL, (with the ocasional "over" & ommiting to report the position of the dingy in distress (pan call) until asked). I was also "taught" that there are real people on the other end trying to help, if they need to know something they will ask.
I recently, during nav ex, called Scottish information, G-xxx will divert from Auchterarder to Kelty, est Kelty mins xx". Gxxxx report Kelty. "Report Kelty Gxxxx". 30seconds later I called "Oh by the way Scottish, Gxxxx is climbing to 3500ft for terrain clearance, over". Gxxxx, roger & thank you for that!
Perhaps not perfect procedure but he didn't fire a microwave beam into my headset.