Good: >>
I really like this picture, I feel as though it sticks well to all three of the rules. This picture shows emotion through her body language with her hands and face. It also pretty much fills the frame and doesn't have too much random area in the background. It is also candid and shows that she was enthusiastic at this moment by her hands waving in the air.
Eh...<<
I don't really like this picture. It doesn't obey the rule of filling the frame. There is way too much empty space around her body. The point of focus isn't on her, so she came out a bit blurry. But, on the contrary, it does show emotion and a candid moment through her smile.
