I actually got fired from a job from making a property look too good. The lady was afraid her taxes were going to go up, lol.
Another lady complained I wasn't mowing part of her front yard. I had her show me. It was the flower bed!
I had one older couple complain that I mowed all the lawn areas on the same day. They said they'd lived there for over 40 years and had never mowed the whole lawn in one day.
Oh, and the people that complain that you didn't mow the weeds in the gravel driveway. Yah, I'm gonna turn my blades on in a pile of pea gravel!