courtesy??
You want this?
Alpha Bravo Charlie 123 please turn immediately right heading 150 for collision avoidance. Please expedite thank you.
Some of you might notice a guy always repeats your callsign, and thank this and that, say the instruction twice....you want this?
How many controller(s) you are talking to in a sector and how many pilots a controller is talking to.
Courtesy?? Care about good morning, goodbye...?? Go home and teach your parrot. Perhaps someone will greet you like this "WELCOME HOME".
Good xxxxx etc etc are not standard ATC phraseologies and should not be encouraged, we are taught not to do that!
DD