Was taught by my airline back in the 70's when I first started with a carrier that "No-one (outside of the cockpit) sees how you operate but a reputation of the carrier is formed by others by the correct use of R/T".
How often is the impression/judgement of an airline made or spoiled by one aircraft using poor R/T?
I insist that my F/O's use correct terminology and write the position report out longhand and read it if he/she is unfamiliar.
Good example of incorrect useage is on 126.9 in the dark regions:
Jepp and Aerad spell out the call as being prefixed by:
"All Stations (Spoken once) this is ........"
How often do we hear "All Stations, All Stations.....", or
"All Stations, Traffic Information....."
My old Captain back in the 70's told me "IT IS EASIER TO GET THE TERMINOLOGY RIGHT THAN TO GET IT WRONG EVERY TIME".
Wise words I thought.