It's not really a genre I watch regularly, but here are my three picks. Make sure to check out - http://wanderingthroughtheshelves.blogspot.co.uk/
Hayao Miyazaki's mind is simply one the most astonishingly imaginative that has ever graced the storytelling world. His stories have transcended language barriers to portray emotionally resonant themes such as environmental pressures and this has never been so gloriously showcased than in Princess Mononoke. Blessed with the most beautiful of images, landscapes and beasts of burden, Princess Mononoke is an imaginative, influential and important film that stands high and mighty amongst the giants of amine genre.
Mary and Max is beautifully animated, clay motion film. It is also equally beautifully and movingly written. The ending is brutal but throughout the film there are moments of humour so its completely a depressing experience.
It's been a while since I've seen this, but I remember enjoying this rather fun homage to horror films. It's from the same people who gave us Coraline, which is the film's USP.