7. R2-D2 continues to be completely awesome
Very few characters have roles in all six of the Star Wars films, and R2-D2 is pretty much the most universally beloved character in the franchise. This reachs a whole new level of kickassery when he spills oil on some foes and lights them on fire with his rocket boosters. We somehow don't think that was part of his original programming, but props to a robot who thinks outside of the box and warms the cockles of our nerdy hearts.