Have you any stories you love so much you wish they would never end?
I remember when I first finished reading The Lord of the Rings being just stunned by the sheer scope of it and wanting to dive back into that world immediately.
On a very different front, the same applied to The Wind in the Willows!
Of course, it is good the stories end. A lot of the time it IS the ending that makes the book stand out. An incomplete story is NOT a story. A story has to have an ending.
So I guess it is the entertainment and enjoyment we have had from these favourite stories that we really wish would not end,
The good news is they don't have to - you simply pick up your favourite book and re-read it!