Its a art, a art you must get down and get it down good. You have to remember Google knows what is good and what converts, the more it gets clicks the more they make the more sales you get type deal.
Once you go through their styles and find out what they want or need or allow you will be set. My first times with the adwords were painstaking as you described now I ether just build em better or they like em better :) The adword phone number I called before was infinite loop of helps and suggestions prerecorded. Because they have so many people using the adwords I wouldnt expect for them to take calls. Just start including all their suggestions into your style.
