I watched the
The Secret of Kells recently and thought it was great. The animation style is entirely unique, inspired by medieval Irish illuminated manuscripts. It's like a layered 2D effect, which I found a beautiful and refreshing break from the Shrek approach to animation.
Also, there are scary shadow Vikings who look like red-eyed bulls and a trippy forest with a sweet wolf-girl and an evil cave. Very much worth a stream.