The Huffington Post has a new, very long, interview with Harry Potter producer David Heyman.  In the interview he talks about working on the series and the final films as well as the different directors they have had do the films and so much more.

Q: I thought people would say, “Is it too British? Are people going to get it?” Even though Lord of the Rings originated with a British author it went beyond the Britishness of it all but part of the Potter films’ charm is their pure Britishness.
DH: Absolutely, and I think we’ve celebrated that more so as we’ve gone on. We had an American director [Chris Columbus] on the first [Harry Potter and the Philosopher’s Stone and second, Harry Potter and the Chamber of Secrets]; Mexican [Alfonso Cuarón] on the third [Harry Potter and the Prisoner of Azkaban]; and then on the fourth[Harry Potter and the Goblet of Fire, we had one Englishman, Mike Newell; and then on the fifth [Harry Potter and the Order of the Phoenix ], sixth [Harry Potter and the Half-Blood Prince]. and now seeing it through to the end [Harry Potter and the Deathly Hallows], we have another Brit at the helm. And that’s great too.

Q: Are you amazed that the series has been so successful or did it seem relatively foolproof?
DH: I didn’t know that we were going to go to the end really until after the fourth film. Once we’d done the fourth film then I felt pretty secure that we’d probably march towards the end. I thought that with the sixth one, there might be a hiccup as it were. And I think the last film will be successful because it’s the last one, but I was a little bit nervous about this one for various reasons.As I’ve said, it was a bit of a tweener, a lot of it is setting up the next film, and one always has doubt – will people pirate it? What’s happened is that I think people have assumed a certain ownership of these characters and these actors; they enjoy watching them grow up before their eyes — our eyes.

Of all the great advantages I have, or we have, over other franchises is that we have Jo Rowling’s books. Certainly other franchises, I mean look at Bond, have to create a new story each time. So, I’m always relieved, a little bit surprised and relieved.