Age of Ultron asks some interesting questions of its heroes. Why do they do this? How long can they continue doing this? It goes deeper with the characters than previous movies.
While the first film is one of the best examples of a purely fun blockbuster, Ultron is a completely different beast. It takes more narrative chances and as a result (at least from a character standpoint) has bigger payoffs.
Age of Ultron isn’t The Avengers, and thankfully it isn’t trying to be. It’s something much more interesting, thought provoking and (dare I say it) profound.
Not everyone gets an interesting arc (sorry, Thor) but pretty much every Avenger is confronted with intriguing character challenges that are handled in an elegant way.
Best moment: “The Vision, Iron Man and Thor shoot Ultron with their beams!!” is the way I would describe my favorite moment in this film if I were 8 years old.