I love every single one of them except for "I can't say nothing more than a phrase" and Love Deterrence original version(but I love the acoustic guitar version,along with the one that plays on Paz's Diary 9). I also find the MGS4 version of Here's To You WAY better than the original one. --- A cornered Devil Jin is more DANGEROUS than a Lazuya!
The one from the red band trailer. Also the music by enio morricone in MGS4 was full of so much feels. It completely sold me on snake being both old physically but also broken down mentally.
That would be Sins Of The Father, if I'm not mistaken. That trailer was very awesome. --- The Unofficial Iron Castle that Smashes Through Mountains of every board in the multiverse. ppl who got it:2 The official Tlaloc of the SMT IV board.