Warcraft/Awesome Music

Warcraft and Warcraft II

 * War Craft I: Orcish Victory Music, especially when the massive Orc Chieftain's portrait is splayed in the background. Not to mention the Orcish narrator explaining the utter destruction of the Kingdom of Azeroth.
 * War Craft II: It's called simply Human 1, but the name is the only non-epic thing about it.
 * Orc 1. War drums playing? Rally the grunts, it's time to go to work.
 * Orc 3 uses a minute and a half to build up the single greatest harpsichord face melter in video game history.
 * Also the intro, helped by the vowel-savoring overacting in the narration.
 * Human 6, a victory fanfare reused in WoW for Alliance battleground victories (we didn't hear it too often on my server).
 * Let's give the greenies some attention. It makes its return in the bonus campaign to the Warcraft 3 expansion, and in WoW when you go back in time to Durnholde Keep via the Caverns of Time, you get to hear it again.

Warcraft III

 * This piece of Night Elf music.
 * The ending music of frozen throne "Power of the horde"
 * Vengeance of the Blood Elves is the truth! It's greatness from start to finish.
 * From the Orcs, "Doomhammer's Legacy," which expresses the faction's Heel Face Turn, and "Bloodlust," expressing their darker instincts and inner savagery.
 * Although there is unfortunately no Youtube video of either theme, the "Comradeship" and "Blood Elf" themes are fantastic. For one that there is, see Arthas' Theme.
 * A link to 'Comradeship. The 'Vengeance of the Blood Elves' theme is the second.
 * From the Frozen Throne expansion, "Human 4," which sums up the state of the Alliance perfectly.
 * Tremble before The Scourge!
 * Arthas' Betrayal. Sends shivers up my spine every time I hear it.

World of Warcraft

 * World of Warcraft has the dubious distinction of creating music so epic that it took years for the developers to find a place in the game worthy of it. I give you, The Shaping of the World.
 * They learned their lesson in the Burning Crusade expansion, and had a specific quest in mind when writing Lament of the Highborne.
 * The music that plays in Shadowfang Keep is pretty darn awesome.
 * For this troper, Battle 01(the second one listed as "Keep") will ALWAYS be Ragnaros' theme. End of Discussion.
 * This Troper always enjoyed the music in Arcanist Doan's room in the Scarlet Monastery. It plays elsewhere as well (including one place in the Molten Core) but that's the place he always remembers it from. Unfortunately, he does not know what it's called, so he can't provide a link.
 * It's the last few seconds of a track called "Legacy" from the main game's OST (the rest of the piece isn't used). Check the first link directly above your post to find it.
 * This troper is not ashamed to admit she got goosebumps the first time she played a human character and entered Stormwind to this theme.
 * Goosebumps? This troper nearly burst into tears of SHEER AWESOME.
 * The newest log-in music is pretty awesome.
 * Some of the Burning Crusade's ambient music is subdued but spectacular, be it the haunting swells of organs and strings in Terokkar Forest, or the ominous chants of Shadowmoon Valley.
 * The music for Shalandis Isle took new Blood Elf players by surprise, but in a very good way. It was so popular that Blizzard has since stuck it in Night Elf inns and the Temple of the Moon in Darnassus (possibly providing the first reason to hang around the city).
 * Sit back, buy a drink, set your Hearthstone, stay awhile!
 * A Call to Arms doesn't appear very often, but you've gotta love the epicness of the second half. And the nice lead-in from the first.
 * An upgraded version of it appears in the Wrath of the Lich King log-in music.
 * This troper greatly enjoyed the distinctive leitmotif of Illidan Stormrage, found inside the Black Temple and in various places across Outland. (Unfortunately, the best examples can only be heard by going into the game's .mpq files.) A melody of ominous strings and bitter reed instruments.
 * And then, there is Arthas, My Son, that song playing behind the incredible intro cinematic for WOTLK. To this troper, however, the song is even grander on its own.
 * This troper likes the older male vocals version that plays at the Ebon Hold better, but likes the first incarnation of the theme the best, the one that plays when Arthas has claimed the Frozen Throne in the titular Warcraft III expansion and sits alone at a frozen wasteland on the top of the world.
 * Or the more militarized Assault On New Avalon arrangement that serves as the Death Knight theme.
 * Or just listen to everything in the Arthas Medley.
 * The conclusion piece, Invincible.
 * The melodies of the Storm Peaks are quietly dignified and tend to give a feeling of sadness and great age. Mountains of Thunder includes some of them.
 * The Culling of Stratholme for the Caverns of Time 4th dungeon.
 * It's been this long and no one has mentioned Silvermoon City? It's the only city to have separate music for day and night. (note that the first two minutes on those videos are the same, being the theme that plays in Falconwing Square regardless of the time of day). It's so awesome it's made it into the title theme for both expansions!
 * Another beautiful piece of Northrend music can be found in the found in the Grizzly Hills, a gorgeous redwood forest with a distinct old American Midwest vibe, complete with lumberjacks, trappers, beavers, grizzly bears, and Native Americans-erm, trolls.
 * This troper always liked the foreboding and gloomy theme of the Un'Goro Crater and the Swamp of Sorrows, but the Sholazar Basin theme quickly won a convert. Another theme that fits the zone is the Burning Steppes theme: you can almost feel the heat. Unfortunately, the theme for the Battle of Mount Hyjal was not used in the raid instance itself. Fortunately, the Karazhan theme did eventually appear in the game.
 * The Joust music, new to the game from Patch 3.1, is also pretty amazing.
 * The latest background music to the Trial of the Champion/Crusader instance is incredible at setting the tone of the instance. It's a lot more noticeable than the music in many other dungeons (in a good way, This Troper knows people who will turn the ingame sounds back on only to hear that tune)
 * The newly introduced 5-Man Dungeons for Patch 3.3 have some very nice dramatic/epic sounding pieces. Such as The Forge of Souls Dungeon & Boss Fight Who, or The Pit of Saron which has so far been appraised as an improvement. The last of the three new dungeons where certainly doesn't disappoint in the dramatic factor either (For those viewing this, I HIGHLY recommend listening while going through the dungeon, it just makes the music all that much better in context).
 * The ambiance music in the Auchindon is absolutely fantastic.
 * The gunship encounter from Icecrown Citadel.
 * Tempest Keep's ambiance music has my vote. It's serene and kinda ominous at the same time. Perfect for a base full of pretty but villainous elves.
 * The Antechamber of Ulduar. The majestic brass and haunting chants echoing through the ancient Titan fortress's vast halls and corridors... Perfection.
 * Remade as Thaurissans Reach in Catacaslysm.
 * And now the Catacalysm Main Theme has been put up on Youtube. Contains pieces of previous themes and zones.
 * The Night Elves get a new theme in Cataclysm, and it is incredible.
 * The new Orgrimmar themefor Cataclysm is the perfect representation of the Horde.
 * And a new entry into the rolls of music tracks that really shouldn't be bad guy themes, Breath of Al'Akir is the sweeping theme of Skywall. Sadly, the main place players will hear this piece is the Vortex Pinnacle.
 * The theme from the Cataclysm cinematic, Xaxas.
 * Bonus points for awesome: the voices of the Old Gods!
 * The Noble Tauren. Rest in peace, Cairne...
 * Nightfall. It might as well be the anthem for all Death Knights.
 * It is.
 * Patch 4.3 released this awesomeness. It almost becomes Autobots Rock Out in some places, but it's done so incredibly well that you truly feel like you're fighting against a force that seeks to annihilate the entire world.
 * The music from Mists of Pandaria gives off an Asian vibe while remaining true to Warcraft. And it is awesome.
 * The new main theme Heart of Pandaria.