I want them to be straight with me, do what they say they will and be on top of the paperwork so you don't get stupid delays.
Mine deserved his commission when I sold my old house - he told me exactly what to do to make it look more saleable, produced some good specs that made it look nice to get the buyers in, did lots of accompanied viewings and was generally efficient re feedback etc.
The wide ones are the worst, when they make stuff up like phantom offers.