There are few series of kids' books that have left a bigger cultural footprint than J K Rowling's Potter saga. The classics that precede it - The Famous Five, Narnia, Roald Dahl's many creations - took a backseat when the boy wizard made an appearance in 1997. And all that came after, however decent - Hunger Games, Maze Runner - haven't quite lived up to the Potter hype.
Why is it, then, that the so called Wizarding World has stuck around so long after the books and films ended? There has been a play on the West End, a couple of theme parks across the globe, and we're still in the middle of a spin-off franchise.
We can only speculate. It could be that the universe she created, a magical world existing in secret alongside our own, will forever be appealing. It could just be the terrific quality of the books and, well, most of the films.
Or, to look a little further into said quality, it could be the fantastically realised three-dimensional characters. They're the ones who bring the story to life. Were it not for them, why would we even bother? While it might be fun to talk about the heroes, we're going to take a different path here, because who doesn't love hating characters that deserve it?