Best Soundtrack Ever!!!

Super Robot Wars (TROMBE!): 

Super Robot Wars (The Sword that Cleaves Evil!): 

Super Robot Wars (Platinum Lucifer): 

Super Robot Wars (Dark Knight): 

Megaman X (Spark Mandril)

Megaman X (Storm Eagle):

Megaman X2 (Zero's Theme):

Megaman X (Enter Zero):

...pretty much all Megaman X music and most of X2 really...

Secret of Mana (Color of the Summer Sky):

Super Mario RPG (Battle theme):

^ So-so song but freakishly addictive.  After first playing the game I found myself humming it for weeks...

Legend of Zelda Ocarina of Time (Gerudo Valley):

The Legend of Zelda:  A Link to the Past (Kakariko Theme):

And so many more... 

Pretty much everything else has already been posted. 

Most of my favorites come from old school games.  Maybe it's just me, but I feel that composers had better melodic concepts back in the day.

Off the top of my head:

-The intro theme to NES Metroid
-Kid Icarus level 1
-"Eight Melodies" from Mother
-Mother's title theme
-SNES Starfox's orchestral theme
-Relm's theme from Final Fantasy VI
-End theme for Chrono Trigger (and practically everything else in Chrono Trigger)

I like a good melody.  To me, a song is nothing without it.

I'd forgotten about that one!   I actually my Star Fox stages in Brawl to use the original SNES theme wherever possible.  The original theme is the best out of all of them and the orchestrated version is beautiful.

I like a lot of the remixes from smash,

and also many Classic music from the Kirby games and Animal Crossing music, they both sound...peaceful

Anything from Chrono Cross or Legend of Mana. Both games had awesome soundtracks.

greatest track is One Winged Angel........... the Xenogears OST is also marvelous..

METAL GEAR SOLID ----- Main Theme (the last 60 secs DEFINE the word EPIC!)



FINAL FANTASY 6 ----- Terras Theme/Overworld Theme



FINAL FANTASY 6 ------ Searching For Friends (AWESOME..especially the flute)



FINAL FANTASY 12 ------ Intro Theme which also the MAIN FF theme in all games

www.OCremix.org is filled with so many good tunes. One of my favorites is from Secret of Mana: http://www.ocremix.org/remix/OCR01172/
check it out.