Is the you that you are most of the time or the drunk you that speaks your true thoughts the real you?
In my opinion, the answer to this question greatly depends on the definition of the identity and who the identity we are trying to prove. For example, people around you may regard your usual behavior as an attribute of you. However, many do not always live or act to their true thoughts as they may have serious consequences.
I believe, at least at this moment, that the true self is composed of one's true thoughts and every other emotion is a mask we put on to survive in society.