Who Are You, Really?

I have something for you to think about.  If I am to ask you "Who are you?", what or how would you answer?  Like most people, you'd possibly say your name. And then, say something like "I'm a doctor" or "I'm a businessman" or "I'm an artist" or "I'm an overseas worker."  But is that who you really are?  If what you do is who you are, then who will you be when you stop doing what you're doing?