I think Harry Potter as made a great impact on its fans. We grew up with the books, it represents an emotional journey tht we took through J.K rowlings imagination and world.
We felt the happiness for Harry when he first recieved is Hogwarts letter, right down to the grief he suffered losing his friends and family in the final war. J.K Rowling has made a world we could escape too, now that the books have come to close and the final movie is not that far off.
I find inspiration, as a young writer, to continue her story past the brink of The End.
disclaimer: I do not own or claim to own the H.P franchise, I'm only a forever loyal fan, and always will be.