As this is now #BookadayUK, please note the British spelling of favourite in my title.
In fact, there is only one book by Austen which would not make it into this ‘old favourite’ category. That would be Mansfield Park, due to Miss Austen’s bewildering decision to frame a story around the bland, boring, bashful Fanny Price. (Jane, what WERE you thinking?) But that’s another topic altogether. When it comes to old favourites, for me nothing trumps the story of Elizabeth Bennet and Mr. Darcy. Nothing.