I just remembered one of the things that drives me most crazy: descriptions of eyes. Seriously. We used to have a guild application question that read "Are your character's eyes described as 'burning', 'piercing', 'haunting' or 'enchanting'?" If the answer was yes to any of those, usually we had a Mary Sue on our hands. 
Just in case it hasn't been posted yet, you can check if your character might be a little too "over the top" with this Universal Mary-Sue Litmus Test.
Just in case it hasn't been posted yet, you can check if your character might be a little too "over the top" with this Universal Mary-Sue Litmus Test.
