It was tough to decide between AA, Layton and Xenoblade. But as AA isn't technically Nintendo, and as Xenoblade is the best thing ever, it had to be this:

There's something so very familiar about the Xenoblade soundtrack. It just fits so well. Be it the Gaur Plains theme during your first real "free" area or the Mechanical Rhythm for later game enemies, the OST adds to the game in every possible way. 

So why did I choose this song? For some reason the story of Xenoblade really resonated with me and for all the best story sections, this song played. The first time is during "that scene" in Colony 9 during your fight with Metal Face and from there it just gets better and better. Whenever this song played you knew something was about to happen, that there would be some twist which would leave you an emotional wreck and the vision system made those cutscenes where you knew what would happen all the harder to watch. It's not the most popular song on the soundtrack, sure. But it's one I'll never forget and at the end of the day, is that not the point?

Dont know if a square enix game counts, but its 3ds only, the world ends with you - Its so wonderfull. 

Anyways, this is only the title screen intro and cant remember if it plays anywhere else in the game but this track for me was the most impactfull. It fit for me the pace of the game, even how it starts all calm and melo then gets a bit more serious and unrgent over time with a wierrd beat. There are many more great tracks in this game, but this one just spoke to me.

The Reggie Fils a Mech is blasting off towards E3! And we're all aboard! :D

Tickets are always available, so let me know if you want a piece of that leg action.

Also, a huge thanks to Myak for his incredible imagination, creativity, and joy. We'd be taking my beat down car if it wasn't for you. ^_^

Hey, don't forget about me!

Lack of me is disappointing :(

Right in the crotch, where I belong.

Eh, some users are more closer to the mecha crotch then you.

I think you're at the happy trail

Oh. My. God. That's amazing! Although the lack of Iwata is disturbing

I see that Myak has taken an interesting position, but what are you doing there, Smeags?

You should be either at the head or in the middle of his left chest... becasue your the brains and heart of this thread.

Look a little closer. ^_~

(You're on the right side of Myak)

@Delio

Get an avatar mister! :P

@JEMC

Iwata isn't coming to E3... but maybe if enough users grab a ticket he'll appear (think of it as a stretch goal )

And now I wish I didn't see myself at all... Being placed there..... oh well..