Come over to the site, and read up on how to be critiqued and critique others. When to use a precision instrument on another writer's work, and when to just "rub some dirt on it" as my hubby would say.
Critiquing others is a skill. Accepting the criticism of your peers is another skill entirely.
Visit: http://ashleyludwig.wordpress.com to learn how to handle both!
For more information on how to be an excellent critique partner, read up here!