I was sick for basically the whole week (feeling a little better now) and thus found myself with some idle time... and decided to watch the whole MCU in order, after recently having seen Avengers 2. Soo...
I'd wall of text it but I'm lazy, so short version (I had already seen Iron Man, Avengers and Guardians, all the others were new to me) :
Iron Man : Good
The Incredible Hulk : Awful
Iron Man 2 : Very bad
Thor : Mediocre
Captain America : The First Avenger : Bad
The Avengers : Excellent
Iron Man 3 : Bad
Thor : The Dark World : Mediocre
Captain America : The Winter Soldier : Very good
Guardians of the Galaxy : Very good
The Avengers : Age of Ultron : Pretty good
Man, phase 1 was disappointing. They're on a decent streak right now though, hope that continues.