I agree with Chelsea.

(Spoilers below)








There was so many unanswered questions like what Dudley saw when the Dementor attacked him, why it's always mentioned that Harry has is mothers eyes, is Sirious really dead (only Harry and Neville saw him fall trough the veil and they could already see the Thestrals) and what is beind the veil.
The way Dumbledore died was crap, I mean for God sake is like one of the most powerfull wizard and he does'nt put up a fight and Harry is a silly git for not wanting to go back to Hogwarts.
By the way love the use of the word SLUT in the book I was'nt expecting that.