This is what I mean when I make notes...
Good job = You did an o.k. job in writing and thinking about your essay; you may have made a few mistakes, but I understood what you were wanting to say overall; you answered the prompt successfully.
Great / good writer = You have a way with words; you take a different approach to writing and use words to pluck the strings of my heart and mind. You have a gift. Being a good / great writer for me does not mean that there are NO or FEW errors in the work; however, it means that the words chosen for the work are unique and thought-provoking. Thought was given before each word rested on the page.
Hope that helps!
Constance, EssayForum Contributor