Having increasingly become a fan of Japanese movies in the last few years, including anime, I can recommend TEKKONKINKREET, which I just watched recently. More info here:
A good flick. However, My all-time anime favourite remains GHOST IN THE SHELL PART II: INNOCENCE. Just a damned beautiful and intelligent film. And since my writing (including my erotic writing) is frequently in a sci-fi context, I appreciate the aesthetic inspiration. This film doesn't turn me on (very few films do) but it is very beautiful.