I actually haven't read any of the books, but I have seen all the movies. I really like to see everyone dressed up in costumes and all the excitement. They were doing face painting, lightning bolt tattoos, and pictures with a Harry double - all for free. I joined in the fun and took a pair of free HP glasses, and got a photo taken.
Dumbledore and the gang, were generous enough to grant me an audioblog interview. Enjoy.