This was my first animation made with Blender. After watching the movie for the first time, I fell in love with both main characters, and decided to make an animation of them. This was a test, but I ended very satisfied with it.
I used Blender Internal, but I just rendered the viewport with OpenGL render, so the animation is actually what you see in real time in the viewport. It's a very powerful tool for slow computers (like my poor old laptop), allowing to get not bad looking results without taking hours to render. This one took around 1 second per frame.