It seems the point of this thread is that everyone should sound like a Speak and Spell and use perfect aviation phrasology. In fact, I challenge everyone reading this to do that for at least a week. Might make mine go faster
Well, it kind of depends.
9 times out of 10 when someone's trying to sound cute on the radio, I'm eagerly waiting for them to get done so I can clarify my last clearance, ask for a vector or something else.
I know one of the controllers on site here and I still keep banter down to a minimum because I never know what is going on in the facility or if another airplane has a situation that needs to be discussed with him on the frequency.
As pilots, we'd freak out if a controller continuously used non-standard phraseology but as pilots we want the leeway to speak lazily.
If Atlanta approach said, "Yo Candler fo' one duece, two ten and take 'er down to 5"
"OMG! Was that heading two one zero and five thousand feet, or five hundred feet? Or was that a speed of two one zero? AAAAAAEIGH!"
My first year at Skyway, we had a flight crew get an altitude and a speed change. The pilot called back "180 and 210", slowed to 180 knots and turned to a heading of 210. The controller could have caught the readback error, the other pilot could have also caught the readback error "I thought it was..." but sloppy radio work got them a nice little "time out".