I'm surprised to hear EGSH (Norwich) were rude. Last time I was there a few weeks ago the lady ATCO in Twr was so friendly and talkative it was almost embarrassing!
If I remember rightly Appr is run from RAF Coltishall. Always had the very best and most friendly service from both, I learnt there many years ago and have been back visiting a few times recently.
I have to admit though that I have the distinct feeling that if I sound "professional" I may get better service, increased chance of a zone transit, etc.....