Also Howl's Moving Castle, Kiki's Delivery Service, Tales from Earthsea and Spirited Away.

Then Howl's Moving Castle, The Cat Returns and Spirited Away.

Also Laputa: Castle in the Sky, Kiki's Delivery Service, Whisper of the Heart, Princess Mononoke, Spirited Away and From up on Poppy Hill.

Can you please add 'From up on Poppy Hill' to the list, Okami_Amaterasu?

This was a really tough decision! I also love My Neighbour Totoro, Ponyo, Spirited Away, Howl's Moving Castle, Arriety, The Cat Returns, Laputa: Castle in The Sky, Nausicaa: Valley of The Winds and... I'm sure I'm missing something... Oh yes! I quite liked Porco Rosso, too! And Panda Go Panda!

Sorry, people, but I don't like Whisper of The Heart, Grave of The Fireflies, Tales from Earthsea, or Princess Mononoke. :/

I wasn't quite sure what to think, when I saw Horus: Prince of The Sun. XD

SPORITED AWAY CAME SOOO CLOSE BUT I'D say PRINCESS MONONOKE

also all of them such a hard question :(

I'm surprised that Grave of the Fireflies is not the first.

and Mononoke

Kiki's and Howl's too.