- Howl's Moving Castle (Hayao Miyazaki)
- The Cat Returns (Hiroyuki Morita)
- Ghost in the Shell (Mamoru Oshii)
- Princess Mononoke (Hayao Miyazaki)
- The Place Promised In Our Early Days (Makoto Shinkai)
The actual post for the Mind Meld contains a bit more info for each, and a hell of a lot of other selections by writers and Otaku alike.
If I were to change the list to include television, I'd probably consider some of the following shows:
- Samurai X
- Crest of the Stars (and Banner of the Stars I & II)
- Gundam Wing (because I grew up on it, so bite me if you think it's stupid)
There are plenty of others I've seen and liked, which poses a problem for me when trying to narrow things down to five. It's easy for films; it's impossible when you combine the two.
In any case, you should check out the Mind Meld. There's a lot of great stuff there!