But that doesn't wash with what you were saying before. So possibly you didn't say what you meant then? Because you were saying that beautiful/smart/whatever girls who are the centre of attention and ordinary girls who are the centre of attention are Mary Sues. The key point there being the attention and not the qualities of the character.

...Not that this is quite relevant to Haruhi, since she did have qualities which made the focus on her reasonable in the context of Ouran.