What's your favourite Harry Potter Film/ Book?

I don't have enough patience to read a whole book.. so I just watch
the films (which I know, I know, it doesn't allow your mind to do the
talking yada yada)
But I still love Harry Potter. I haven't watched all the films,
either, but I AM going to.

My favourite, by far, is The Prisoner of Azkaban.. it just has such a
happy ending, and all the way through it's scary but happy :)

How about you?