It was a close race, but the winner of "Favorite Harry Potter Novel" is Harry Potter and the Prisoner of Azkaban. There were no votes at all for the first two books, and the last two books tied for second place. I am not surprised - I think that the series really started to take off with the third installment - that's when I became seriously hooked.
Thanks to those who voted. And don't forget to vote in the new poll - it's all about books (of course).