I disliked Mary from the first episode of the show...as the Crawley saga continued, though, I think I just got used to not liking her; it became so routine to disapprove of her that I kind of forgot just how much I disliked her. Then about a year after the series finale, I decided to rewatch everything from the beginning. With episode one, I was instantly struck, once again, with total disdain for "Lady Mary." She is a bitch - pure and simple - and my absolute favorite moment of the series is when Edith tells her so!