I treat people the way I want to be treated, regardless of if a client, friend or someone behind the till at Tesco's. For me that is how it should be, but it is also good to remember that we all offer different things and those things have an impact on the conditions we need for comfort. What will work for you, may not work for another and it is not fair to expect all to be able to work with your conditions for that reason, or assume that they are being unfair for expecting other things.
Most of us try our best to provide a service that will make our clients happy and return and I'm afraid that the ones that don't (generally) don't care, so they won't listen to what any of us say. Unfortunately as the review system only seems to highlight the positives (as a rule) many don't get to know when they are walking into a situation that won't give them satisfaction, but that is partly their fault too, as many don't have a clue what they are going to get. I had a client Yesterday who didn't have a clue what I offered until we were in the room together. Thankfully he was happy with what I offer, but who's fault would it have been if he wasn't?