I don't know if I have a fav part...
I love the river scene because it is such a great addition to the story!! Wish it was in the books!
I like it when they are playing cricket and Peter hits Edmund with the ball (priceless!) because Will is hott and I love how he says "Whoops!" and I think it is a better excuse to be hiding in the wardrobe than hiding from Mrs. Macready and the tourists.
I love the battle scene because it is so freaking awesome and again, Will looks hott, once his helmet is off, that is. And the music, lol.
The train station scene is very touching and sad, and I like the coronation scene too-- better expansion and explanation than in the book!