Long Journey..Thanks for starting this thread!
Look into their eyes.
People who look to the sides a lot are nervous, lying, or distracted. However, if a person looks away from the speaker, it very well could be a comfort display or indicate submissiveness. Looking askance generally means the person is distrustful or unconvinced.
If someone looks down at the floor a lot, they are probably shy or timid. People also tend to look down when they are upset, or trying to hide something emotional. People are often thinking and feeling unpleasant emotions when they are in the process of staring at the ground.
Some cultures believe that looking at someone in the eyes is a sign of disrespect, or is only done with intimate friends or family, so this could explain why someone is avoiding eye contact with you.
Dilated pupils mean that the person is interested. Keep in mind, however, that many substances cause pupils to dilate, including alcohol, cocaine, amphetamines, MDMA, LSD and others. Don't mistake having a few drinks for attraction.
If their eyes seem focused far away, that usually indicates that a person is in deep thought or not listening.