what is your favorite act in mgs4 (CONTAINS SPOILERS)

[JOKA_]

Gameplay:
1.) Act 1
2.) Act 2
3.) Act 5
4.) Act 4
5.) Act 3

Story:
1.) Act 5 (and ensuing epilogue and mission debriefing)
2.) Act 3
3.) Act 4
4.) Act 1
5.) Act 2