Sorry this is kind of late.
The best and most serious entry in the Full Metal Panic franchise. It not only looks the best but also has the most robot action in it. I do like the Full Metal Panic world and characters. Its not my favourite non gundam mecha universe by any starch of the imagination but I do enjoy it. I really like the main robot or “Arm Slave” Arbalest. I really dig the knife on the face thing that it has there sometimes, its neat.