Over the years I have found that supposedly I am slightly more observant than the average person. I honestly thought that I surrounded myself with some dim-witted individuals during my adulences years, but maybe not. To my misfortune I never took the time to learn the associations between visual cues with emotional behaviors. I would most likely point out defects or mannerisms the person had, which resulted in some people finding out that they did things they never knew they did, or giving me an association of being an asshole.
I do belive to get a better understanding into the visually observed actions and how they relate to what a person maybe thinking, or how they are feeling I would really have to delve deep into psychology. If time permitted, I would love to, considering I have a very close associate of mine who studies it in great detail.
Being able to read a person could help in so many situations, a job interview, a business deal, even on a date. You could essentially become the person that someone is looking for if you can read them well enough.