User blog:PurpleCheeseDragons12/When does a character become a Mary Sue?

NOTE: If you want to skip the monologue, the question is down below. Creating a good Sonic fan character is a bit like skydiving- you either succeed at it, or you don't. The question is, at what point does a character cross the line into Mary Sue-ness, at which point they are unable to return?

For that matter, what exactly makes a character a Mary Sue? This isn't a rhetorical question, by the way, I really don't know. Anyone have a cue card?

I suppose in some way, the characters we create represent us. Maybe they are who we wish to be, maybe they are the parts we focus on the most. So in a way, they are us. And we don't want to show the world our flaws, we don't want to make our character, and ultimately ourselves, lower than our impossible high expectations.

Instead we want to be who we never could be in real life, because we know it far too well. The Sonic world is exciting, the unknown, a place where we all could shine if only we had that chance. It could be just me though.

//*END of Blah-blah boring talk talk.

So what does make a character a Mary Sue?