At the end of the day read the ATC section of the Jepps plus the Met section or the AIP and pronounce phrases as printed in black and white. This is what ATC and other pilots are expecting to hear. How often do you hear a controller making up there own calls? It just doesn't happen. The format passes the required info in a concise and predictable manner.
As stated, monkey see monkey do. One must be trained from the start. Take pride in your profession. Most of all, think before pressing the PTT.