The A & B team.
We had this problem here in Iceland but now most if not all the controllers know how flexible helicopters are. Now a days we almost always get the clearances we ask for.
Bad:
What I really hate the most is the grumpy controller! The one that shouts at the first solo students and gives you hard time "just because he can"!
Also the controller having you hold in the hover for minutes just to wait for some 3 or 4 small airplanes on the other side of the airport taking off and landing!
I think it is a good idea to write an article about this and how much workload is on helicopter pilots hovering around the aerodrome, limiting their ability to adapt to changing frequencies and turning equipment off.
Good:
The female controllers who have that lovely voice.