Should Gender Stereotypes be challenged?

[Kingpin]

I'd like to ask a question to my fellow males:

Why does some people, especially men, despise some qualities of masculinity such as aggression and competitiveness?

Isn't that what makes us men? Why should we deny these qualities that makes us who we are? I mean like I don't see, and I don't mean to offend anyone, any females despising their feminine qualities or anyone advocating them to be more masculine?
Is it really a bad thing to be a man?

What do you think it means to "be" a man?  It sound like you have an idea that is most likely going to fall in to the stereotypes you outlined in the OP.  Throughout generations this definition of what it was to "be" a man has changed.  In the Victorian era, this was what was expected to "be" a man:

Victorian social etiquette for gentlemen in the presence of ladies:

• Stand when a lady enters a room.
  
• Stand when a lady stands.
  
• Offer a lady your seat if no other seat is available.
  
• Assist the lady with her chair when she sits or stands. Especially at a table.
  
• Retrieve dropped items for a lady.
  
• Open doors for a lady.
  
• Help a lady with her coat, cloak or shawl.
  
• Offer to bring a lady refreshments if they are available.
  
• Offer your arm to escort a lady (with whom you are acquainted) into or out of a building or a room at all social events, and whenever walking on uneven ground.
  

Basic social rules of things a gentleman should never do:

• Never refer to another person by their first name in public.
  
• Never curse or discuss “impolite” subjects when ladies are present.
  
• Never leave a lady you know unattended, except with permission.
  
• Never use tobacco in any form when ladies are present.
  
• Never greet a lady in public unless she acknowledges you first.
  

Is this what it means to "be" a man, or are these reserved for "gentlemen".  Being a pompous neanderthal in my book is not "being" a man.