Here is how I rank the MCU films:
1. The Avengers ****
2. The Avengers: Age of Ultron ****
3. Captain America: Winter Soldier ****
4. Iron Man ****
5. Incredible Hulk ****
6. Captain America: The First Avenger ****
7. Thor: Dark World ****
8. Thor ***1/2
9. Guardians of the Galaxy ***
10. Iron Man 2 ***
11. Iron Man 3 ***
After I view Age of Ultron a few more times, I might place it above Avengers.
1. The Avengers ****
2. The Avengers: Age of Ultron ****
3. Captain America: Winter Soldier ****
4. Iron Man ****
5. Incredible Hulk ****
6. Captain America: The First Avenger ****
7. Thor: Dark World ****
8. Thor ***1/2
9. Guardians of the Galaxy ***
10. Iron Man 2 ***
11. Iron Man 3 ***
After I view Age of Ultron a few more times, I might place it above Avengers.