Have we met before?

I imagine myself to be much smaller than I am, and much cooler -- often forgetting that a large, quiet, white man that isn't the life of the party doesn't get recognized that often in the street. People don't recognize me even though I have met them before, sometimes many times. Some people will try to talk to me but will give up after a while, seeing nothing there worth pursuing. I don't know what to say about myself: who I am, what do I do. I have completely become what my job is because there is nothing but my job that is remotely interesting. But I detest my job and the idea of being defined by it.