Theories of Motivation

Psychology would like to be considered a science, but there are so many mysteries yet unexplained. Our discussion this week on motivation and emotion would be focused on attempting to unravel some aspect(s) of those mysteries
From your reading you have seen that there are several theories of motivation. You may also sense that some of the theories may not specifically apply to you. Given that introduction, which theory of motivation is the best fit for describing your behavior/motivation and Why? Explain/describe with relevant examples?