Through the years I have learned that one's identity is actually derived from one's life story. How one reacts to events and stimuli they experience during their lifetime forms their life story or as we like to call it one's 'Tapestry.'
Our identity is who we are; not what we do for work.
So I say, look at your life story because those choices within it is what has made you who you are today. You are the author of your own life story. If you are not happy with the results pen a new page in your story. Look at all that you are deep down inside. There you will find your identity.