So would it be OK for an ATC controller to use his own forms of "unique, fun slang, and personalisms" into his communications with pilots? Would you appreciate that?
I can tell you what I appreciate: Anywhere I go IN THE WORLD, ATC controllers sound the same. I'll tell you what: when it's at night, in the weather, and in a third world country (or anywhere in the U.S.), that's a good thing. I know what they expect, and I know what's expected of me.
I don't have time to screw around with anything else. I don't want controllers to try and get "cute" with their own jargon or colloquialisms. I want to hear, AND GIVE, communications that are succinct, clear, and UNDERSTANDABLE, without question. The ONLY way to do that is to adhere to the standard phraseology of the AIM; ICAO; 7110.65 Pilot/Controller Glossary. It's not glamorous; it's not cute; BUT IT'S SAFE. And that's what matters.
So get over yourself. You're not cute. Your'e not amusing. You're not cool. You're just a 'doosh' for deviating from the Pilot/Controller glossary and jeopardizing the safety of yourself, your passengers, and everyone else in the airspace around you.
Try reading some of the perspectives of Don Brown, a 20+ year Atlanta ARTCC controller. Maybe then, you'll appreciate what the guy on the other end of the radio has to say about this subject.
http://www.avweb.com/news/sayagain/