I've been a fan of Babylon 5 for years.  If you haven't seen it, do.  TNT airs reruns.  Buy yourself a bushel basket full of blank tapes and have at it.

One of the interestings things about it is the questions that come up, over and over again, over the 5 year run of the show.  The Bad Guys (the "Shadows" ) through their agents ask, over and over, "What do you want?".  The answer helps them judge temptability -- who has unexamined desires that can be played to, who can be used?

The Good Guys (the "Vorlons" -- secretive, cryptive and manipulative forces for order, masters of the rhetorical non-sequiter) ask "Who are you?".  As life questions go, it's not a bad one.

The entrance exam for this struggle is an essay test.  One question: Who are you?  Unacceptable answers are those that depend on you name, your function, your job, your position in life.  How you answer this question determines how you will answer every other question.  Points are taken off for  narcissism.

Who are you?
 

See also here (The Lurker's Guide to Babylon 5, on the season 2 episode "Comes the Inquisitor", which is all about "who are you?".)