The Myst soundtracks are good. Enter Spire in particular is awesome.

I have yet to hear a John Williams soundtrack that wasn't superb. If you read a fic about Twilight Sparkle and Shining Armor, I'd recommend "Luke and Leia".
Oh, and the Lord of the Rings soundtrack is excellent, as are the Doctor Who soundtracks (classic and new).

Heather Dale, hands down. And anyone who knows me could have seen that coming a mile off - Crashing Down is named after one of her songs, after all. If you're at all interested in Celtic-Folk-whatever, Heather Dale is the person to go to. (And it doesn't hurt that she's a lovely person in person, either)

Other than Heather (I know, gaspshock, I have more than one taste in music), I've always been a big fan of Queen, and have sort of extended that into David Bowie by some sort of cosmic osmosis. ... oh, and Jonathan Coulton, of course, who seems to have perfected some art or other, but I'm not quite sure what... still, Skullcrusher Mountain is the first one of his I was introduced to (by a PPCer, no less), and remains a favourite.

See? Musics! Many musics! I am a rounded personality!

hS, with totally diverse interests honest

I'm not an agent yet, but here are a few recommendations. Lindsey Stirling has some really good techno/violin music, and journey and Kansas are good 80's music. Owl city, The civil wars, Simon and Garfunkel, Train, the script, survivor, foriener, evanessence, within temptation, Regina Spektor, and Kate Nash. Most of these are pretty common, but I like them. You should give them a try.

Ever hear of Two Steps from Hell? They do this great orchestral-type music, mainly for movies. Speaking of which, composers like Zach Hemesy and John Williams have some pretty good stuff too..

...some excellent French artists? I'd suggest listening to the band "Les Trois Accords" (try their Youri and Grand Champion International de Course. Just know that their music videos have absolutely nothing to do with what they're singing about), Edith Piaf (her Amants d'un jour is particularly beautiful), and anything by Alain Bashung.

Basically anything in which the characters die.

And recently I've got into Abney Park. Yay for steampunk!

Well, I'd recommend a lot of things. The Protomen, Powerglove, The Raconteurs, HammerFall, Neil Young, Iron Maiden, and Rush.

Here's some awesome to start off with: http://www.youtube.com/watch?v=LQEgZNqa8jE&list=FLjy6SNIx675ppG4oLX1nSA&index=15&feature=plppvideo

deadmau5, Maroon 5, Angelspit, Goldfrapp, Sneaker Pimps, IAMX, Garbage, Florence + the Machine, Skrillex, Apparat, Lady Gaga, Shiv-R, Yeah Yeah Yeahs... I have a lot of favourite bands.

However, I'll give you a few songs to get you started.

Angelspit- "Defibrillator"
deadmau5- "Strobe"
IAMX- "My Secret Friend"
Yeah Yeah Yeahs- "Zero"
Shiv-R- "Pharmaceutical Grade"

Give them a try.

I listen to video game soundtracks, like those from Super Robot Wars and/or Touhou Project.

Other than that, I like Queen and JAM Project.

Everything from Dvorak and Saint-Saens to Nightwish, Taylor Swift, and Owl City. Ooh! Beethoven, too. And sometimes just for fun I listen to the different versions of "Marukaite Chikyuu" and "Hatafutte Parade".

But movie music is pretty badass too. "Mind Heist" by Zack Hemsey and "Unstoppable" by E.S. Posthumus are so awesome that if you play them while watching/listening to anything, that anything will automatically become badass.

I tend to be all over the spectrum when listening to music. Recently I've been really into Vocaloid songs, but those don't stick to a single style or genre. Other than that my favorite bands would probably be The Fray, OneRepublic, and Five for Fighting.

I love power metal and symphonic metal (Nightwish, Kamelot, Sonata Arctica, Apocalyptica, Lordi, and the first half of the stuff Irish Samurai just mentioned), and have a strange addiction to metal remixes of Touhou music (e.g., http://www.youtube.com/watch?v=8B4JfbnqSGw). I also like Celtic (like the aforementioned Blackmore's Night or, um, more Touhou remixes: http://www.youtube.com/watch?v=-Q9geGcGVBk) and a lot of game soundtracks (Castlevaniaaa... Umineko no Naku Koro Ni and anything written by Yoko Kanno or Yuki Kajiura.

I have fairly eclectic (read: random) tastes in music, although I do mostly consider myself a metalhead.

Stuff I'm enjoying at the minute includes; Metallica, Iron Maiden, Nightwish, Van Canto (deserving a special mention for inventing [to the best of my knowledge] the sub-genre of a cappella metal), Hammerfall, Lordi, Dragonforce, Led Zep, Meatloaf, Santana, Dire Straits, Queen, Pendulum, Turisas, and I have recently developed a fondness for 'nightcore' remixes thanks to youtube.

Actually, the music I listen to can be roughly divided into three categories: Celtic, Classic, and soundtracks.
So, um, a sample from each, I guess.
The Celtic sample is Darkness by Blackmore's Night.
The Classic sample is... {insert dramatic drums here} BWV 1052! (Yeah, there's a lot of Bach to choose from; this is my favourite concerto, together with BWV 1056)
The soundtrack sample is Yuuki no Imi (The Meaning of Courage, that is) from Magical Girl Lyrical Nanoha StrikerS's soundtrack. Which is pure awesome.
You can find all of them in YouTube.

Anyhow, just going to rattle off a crapton of stuff I like:

-The Birthday Massacre
-Sleater-Kinney
-Annie
-The "Nightmare Before Christmas" soundtrack (shut up)
-Ladyhawke (I highly reccomend her if you like Bloc Party)
-Pretty much anything dubstep/really good nightcore (surprisingly, this does exist, i.e. http://www.youtube.com/watch?v=Eg3WlMhpdGk)

I'm mostly a ska, techno, and rap guy myself. Thus, my recommendations are Adam WarRock (who raps about comic books and Firefly), MicTheMicrophone (who raps about MLP), Reel Big Fish (Awesome ska band), Pain (Awesome geeky ska band. Think They Might Be Giants, only ska), and the entirety of this channel.

I also have a fondness for Rockleetist, who does awesome English dubs of Vocaloid songs.

Natually, all of this can be found on youtube.

I was just going to post this same thread, mate. o.O

Okay. Here's my short-list, in no particular order...

a-ha, the Smiths, the Cure, Sting and the Police, the Clash, the Sex Pistols, Depeche Mode, Erasure, Annie Lennox/Eurythmics, Vitamin String Quartet, Gregorian, Muse, Coldplay, the Beatles, and assorted video game/movie music. (The Myst soundtrack is lovely.)

Oh, and JulyFlame recently got me hooked on Voltaire. ^^