consider either the character of Jay Gatsby OR Nick Carraway.  Think about all the things you have read about either character throughout the novel, and make a moral study/judgment of either one of them.  Perhaps you see Gatsby as a noble person pursuing a years long goal, or perhaps you see him as a delusional person who turns to organized crime to ruthlessly pursue a goal that is not worth it.  If you wish to write about Nick, maybe you see him as a person who tries to take his father’s moral advice, and who stays out of the less than savory activities he sees during the summer of the book.  But then again, maybe you see him as someone who presents his supposed morality to you the reader, but who stands by and watches lives being destroyed, affairs being carried on, and the like, and never really steps in to stop the unethical behavior he supposedly frowns upon.  Whatever your approach, try to not play the middle ground and say Gatsby or Nick is both good and bad. Form an opinion that has a clearly defined and defended position, and firmly support it with your own thoughts, as well as quotes from the book.  This may be taking things too far for the length and purpose here, but if you wanted to refer back to some of the essays from The Presence of Others, you could do so, as several of them have to do with ethical concerns.  This is NOT a requirement, however.

Though this paper is reduced in length, it should still be organized as a formal paper with an introduction, clearly defined and purposeful body paragraphs, and a conclusion…don’t just write a big chunk!  Have a thesis that defines your position and helps guide your content!