How are men portrayed in the great gatsby? What standard of masculinity does the text reinforce or construct?

The three main men in The Great Gatsby each represents a
different kind of masculinity. 

Gatsby is romantic and
poetic, with a whimsical and idealistic view on the world.  Although he is his filled
with sorrow, this only further enchances his dreamy nature.  He is living life as a
dream, and he is completely unable AND unwilling to wake from it.  He is a romantic
idealist.

Tom is a "man's man," although none of the men in
Gatsby care much for him.  He is also dangerously aggressive.  He
is the type of man who wouldn't think twice about shooting a deer, hitting a woman,
ignoring a child, or ruining a life.  His life is based around money, luxery, and an
apathetic outlook on the souls of others.  Tom may be a kill-joy, but his presence in
the novel is absolutely necessary for the development of the other
characters.

Nick (my favorite :)) is
what we might call metro-sexual.  He is quiet and reserved, and quite inexperienced in
the darker areas of life.  He treasures his friendship with Gatsby, is resentful of
Tom's treatment of Daisy, and tries his best to watch over his frail and spoiled
cousin.  It is through his eyes that we watch the novel unfold.  He is perhaps as
sensitive as Gatsby, but far more sensible. 

An interesting
factor about Gatsby and Nick is that they both (at different life stages) fall for
frivolous women (Gatsby for Daisy and Nick for Jordan), but Nick has the good sense to
walk away; however, Gatsby dies for his love.

All three men
are fascinating to study.   Good luck on your assignment!