Favorite HP movie and why?

[That's Arka]

Discuss what your favorite Harry Potter movie is.

For me its Prisoner of Azkaban. It was a Huge visual and graphics leap for the movies, as well as a wonderful story. It also had more dark and evil stuff, like the fact that there's a murderer on the loose. It might be the first movie to seriously screw up plot elements (marauders anyone???), but its still my favorite movie. All the weird mistakes and errors in the movie are acceptable to some degree, even fun to see. PoA is something I can watch over and over. Also it has great characters like Sirius and Remus. Unfortunately it also encourages SB/RL shipping...

Overall it was a good movie, while I can only call the other movies decent (though GoF wasn't bad).
The acting was dramatically improved, and Alfonso Cuaron did a great job.