xD I can't wait either.
Personally, I liked Book Three (Prisioner of Azkaban) the best, the reason why escapes me, but I just liked it. I didn't like Chamber of Secrets, and the movie creeped me out also. o____o

Knowing me, what's going to happen when the last book is released: I'll stay away from the internet or anything that could possibly spoil the book for me, and shut myself in my room and read for five hours solid to finish the book.