My favorites are when an investor-buyer is the contact and they show up with a list of repairs as long as a Tom Clancy novel. They usually have a lot of cosmetic issues (paint, carpet, etc) and substance things that they can't really detail, but tell you (like the water heater is ten years old, so it may fail tomorrow).
I don't mind the lists they have as long as they are realistic. I discount the value for cosmetics (paint, carpet), because they do impact what a buyer would be willing to spend. What bugs me is when they tell me that the house needs a $30k kitchen remodel when the house is 5 years old, it's only worth $150k repaired and there's nothing wrong with the kitchen.