Avengers: Age of Ultron - 10/10
Perhaps I'm being too kind on this one, but I really do think it was every bit as good as the first Avengers. Sure, there are some dangling and disconnected plot threads, but those are so minor compared to the things this movie does right.
The character work is among the best in the franchise, with their playing off one another as a highlight of the movie.
The whole scene with Thor's Hammer was brilliant and subtle and led to a later scene.
Ultron is probably my favourite villain in the entire MCU so far, as he was interesting, nuanced, menacing, and fun while also being just the right kind of sinister. Sure, he wasn't all that dangerous, as it seems he was barely a step ahead of the Avengers at every turn, but that didn't detract from his aura.
The entire scene in Africa from the bit with Klaue to the Hulkbuster vs Hulk was a tour-de-force of character and action, and it had me in tingles from beginning to end.
The final sequence in Sokovia was thrilling, even if it was pretty similar to the fight vs the Skrulls or Kree or whatever they were in the end of Avengers 1.
The themes in the film were also quite well integrated, from the hubris that comes from ambition and the different views on how to save the world and how that could manifest as good or evil. Lots of stuff going on underneath the surface here.
Honestly, I absolutely love this movie, and I cannot understand why it's considered by many to be one of the weakest in the franchise.
So yeah, 10/10 on the marvel scale, but here's my rankings on the global scale:
9.5 Avengers: Age of Ultron
9.5 The Avengers
9.4 Guardians of the Galaxy
9.4 Captain America: The Winter Soldier
9.3 Black Panther
9.2 Captain America: The First Avenger
9.1 Iron Man 3
9.0 Iron Man
8.9 Iron Man 2
8.7 Thor: The Dark World
8.3 Thor
6.1 The Incredible Hulk