What are some of the main conflicts that Nick experiences throughout The Great Gatsby?

Nick, the narrator of The Great Gatsby, goes through the
following
conflicts:

• East
  Coast-bias vs. Midwestern-bias: Nick, who is from Minnesota, thinks that
  most of those from the Northeast are careless, shallow, and materialstic.  Implicitly,
  he believes those from the heartland are most honest.  Although he moves to the
  Northeast in hopes of financial success, he ultimately moves back
  home.


• Reserving Judgement vs. Gossiping
  Later: Nick confesses on the first few pages that he has been taught by
  his father to reserve all judgment. He also admits he is the only honest person he has
  ever met.  But, doesn't he reserve judgement so that he can be privy to gossip by those
  with loose lips?  Isn't the entire novel a kind of gossipy violation of his own
  principles?


• American dream: reality vs.
  myth.   Nick presents two Americas: one of opportunity (Gatsby's); one of
  exclusivity (Tom's).  In Gatsby, he gives a picture of promise and tragedy.  In the end,
  after Gatsby's death and Nick's migration back home, we must wonder if he believes the
  American dream to be a false promise.