Doujinshi Mary Sue/Gary Stu discussion

[ekrolo2]

I always figured a Mary Sue/Gary Stu was someone who is typically flawless and too powerful for anyone to handle and serves no real point other than to show just how powerful this character was by defeating previous villains or heroes related to the protagonist or the protagonist themselves, having little to no effort with dealing with the aforementioned types of characters.

I mean if you don't mind me asking what are some of the qualities that make character X a sue/stu?

Never failing/losing, being the constant center of attention for all the characters, being better than canon characters (which wouldn't be a bad thing except usually they're put at an even level as them such as making them a fellow student), ridiculous levels of power that defines OP just to name a few.