I agree with everything you've said, especially since a few weeks ago I replayed the game for the first time since I was 13 and remembered just how much MM made me shiver and tear up.

Another thing that makes this game so creepy [and I love it for that actually] is this theory I read recently about Majora tricking Link and the Happy Mask Salesman by sealing its spirit into Fierce Deity's Mask. Right here - http://zelda.wikia.com/wiki/Fierce_Deity Sure gave me some chills, man.