What is a Christian?

If someone were to ask you, "What is a Christian?" What would you say?
Would you try to describe a Christian by the organization she belonged to, that she attended a certain kind of church? Or maybe you'd begin by detailing the 'good life' he lived, or maybe you'd tell about the facts, the beliefs that he subscribes to. What is a Christian? A question like that can be fecund, as with most perpective queries.
Kenneth Tynan while interviewing Richard Burton asked: You meet a man at the end of the world, and he asks you three questions which you have to answer spontaneously and immediately. The first is: Who are you?

Burton: Richard, son of Richard - for I am, both my father and my son.

Tynan: The second question is: Apart from that, who are you?

Burton: Difficult, devious and perverse.

Tynan: And the third is: Apart from that, who are you?

Burton: A mass of contradictions. As Wait Whitman said, "Do I contradict myself Very -
well, I contradict myself. I am large, and I contain multitudes."

What is a Christian?
Apart from that, what is a Christian?
Apart from that, what is a Christian?