This may not be a driving force for selecting a hotel, but I was SO impressed by the valet staff. You have to park with the valet, so you're sort of at their mercy. Fortunately they're just terrific.
Never failed to remember my name, asked how my conference was going, and how I was enjoying my stay. I took Uber for the first time and was very nervous about it. The valets walked me to the car, checked the door locks before I got in, had the driver roll down the window so they could see his face and said, "You make sure you get her there safely. We'll be here waiting for her to get back." It was like having my sons take care of me. [Less]