Vision of Escaflowne would be one of my favourite series . For movies , pretty everyone from Hayao Miyazaki and Ghibli Studios , especially : Spirited away , Grave of the fireflies , Whisper of the Heart and Mononoke Hime . And then some of the older stuff , Akira , Battle Angel Alita , Ninja Scrolls .
But my Alltime Number one is :
http://www.youtube.com/watch?v=8oui3kAkUqE