The Microwave Hall - Beautiful marriage between gameplay, storytelling and cutscenes

The Jeep - I am a firm defender of this scene. The monologue, the fact Snake never speaks, the music - If you really hate it, you can at least skip this one

The Ladder - Definitely the most iconic. Only ranks in the middle because I think the others are equally cool

The Elevator - Pretty unmemorable

The Stairs: Stupidly long and you have to deal with either infinite enemies or tons of turrets