Think hotel staff only know what you tell them? Think again. From the moment you make a reservation to the moment you check out, you’re leaving behind little clues about yourself, often without realizing it. The way you talk, what you ask for, how you behave, and even how you use your room can tell experienced hotel staff surprisingly much about you. From whether you’re a light sleeper to how particular you are about cleanliness, here are 10 things hotel staff notice about you.