Until you get to talk to a person for the first time, all you have to go on is the way they look, a simple smile is also something that both genders may look at. According to a study these are the top things men notice first on women their figure, face, how she's dressed, eyes, and legs. The features that women notice first in a man are: how he's dressed, eyes, physique, face, and legs.
Are any of these true for you?