Relationship of Personality and Appearance

After marinating on the subject I have came to the conclusion that physical appearance can sometimes relate to someones personality but overall you can't for sure judge a person based completely on their appearance.  You may encounter a very large man but find that he is very caring and quiet.  Also you may find that some smaller people are very loud, outgoing, and not afraid to speak their mind.  If my internal personality was directly related to my appearance then I would look the same because what I look like now is me and no other appearance could better represent me than me.