Well here are my thoughts on Marry-Sues. I dont think they are a bad thing, in fact i think its a good way to work on your creativity. I think the "Mary Sue stage" is a really good and important one to go through. You're learning to create characters at that point, and yes, if you go to far then you need to learn to reign it in. But that's part of learning to write well. When someone flames what they think is "Marry-Sue"not only is it not helpful for the creator but it could hurt their self confidence, and make it hard to go ford in their creation for fear of their stories or art will be flamed for so called "marry-sue-ness ". And really who are we to put down another work Just because we think their doing it wrong?.....just my thoughts...