I only register Mary Sue when they're half everything under the sun with all the benefits, one of the disadvantages and everyone is falling head over heels for them and they get away with everything because teehee they're so cute and they meant well and maybe with a bit of godlike powers thrown it but they're so sweet and wholesome despite their tragic backstory they just create entire ass planets in their spare time.

Not that I've encountered too many of those over the years >_>