What's Your Favorite Anime Music?

[Griffin]

Easy.

SUPER DRIVER- The Melancholy of Haruhi Suzumiya
Hare Hare Yukai - The Melancholy of Haruhi Suzumiya
God Knows...  - The Melancholy of Haruhi Suzumiya (My favorite song of all time)
Lost My Music - The Melancholy of Haruhi Suzumiya
Tomare! - The Melancholy of Haruhi Suzumiya
Bouken Desho Desho- The Melancholy of Haruhi Suzumiya
TONIGHT, TONIGHT, TONIGHT - Bleach
Asterisk- Bleach
Ride on Shooting Star - FLCL
Blues Drive Monster- FLCL
Last Dinosaur - FLCL
Kagen No Tsuki- Mononoke
Hito toshite jiku ga bureteiru - Sayonara Zetsubou Sensei
Kusou Rumba - Zoku! Sayonara Zetsubou Sensei
Marionette- Zoku! Sayonara Zetsubou Sensei
Koji Romanesque- Sayonara Zetsubou Sensei
Alumina- Death Note
The WORLD- Death Note
Zetsubou Billy- Death Note
Dear You- Higurashi No Naku Koro ni


And if it matters

Kumikyoku Suite Nico Nico Douga

[foge40]

Gurren Lagann! Row Row Fight da Powa!

[Noah Gabriel]

Gekidou- UVERworld is awesome.

[Vanilla Kiss]

The music from Clannad is suuuu pretty. All of it. A Large Family of Dangos, su kawaii!
Cowboy Bebop, was unique in the music department, not what you usually see in anime, loved it though. The Naruto Shippuden OP (English) the OP sucks, but song is catchy! FMA OPS, all of em were good. Iunno the names haha.

[Polka]

Alot of J-pop for me.
Some songs from D.Grayman, And tons of other various anime.
But Code Geass the most.
They're OST's are amazing. Like Continued Stories, Stories, If I were a bird...

But if there's one thing I love the most, it's Vocaloid.
For those who don't know what it is, Vocaloid is a singing synthesizer application software developed by the Yamaha Corporation that enables users to synthesize singing by just typing in lyrics and melody. It's really amazing.

Here's some good examples. Of course, they don't only do J-pop or sound like that. There's thousands of songs by Vocaloids, and I find it amazing.
http://www.youtube.com/watch?v=VoPzP-MwcLI
http://www.youtube.com/watch?v=WGLMBwqO9jQ
http://www.youtube.com/watch?v=VnL3xijt-hQ
http://www.youtube.com/watch?v=iL0gsBWf2cI
http://www.youtube.com/watch?v=YQv_DPBbdd4

Just look up Megurine Luka, Hatsune Miku, Gumi, Vocaloid, ect. on youtube and you'll get tons of other songs C:

[A Misunderstood Ninja]

http://www.youtube.com/watch?v=gYPFwWS9YYo

Battlecry - Nujabes feat. Shing02 (Samurai Champloo theme)

[kawaiinekonya]

I've been listening to K-ON! music, and the opening to nyan koi. WHich are my two most  recent watched and finnished animes.....

[Jupis]

i will second Cowboy Bebop but i also have to say the opening for berserk and forces both good songs

[j99450]

Gundam 00, "Tomorrow" in particular.

[umikaze]

Alot of the animes I watch I love the songs and hav them on my laptop just so when i don't want to watch any I can play the music out loud.     

[foge40]

Gurren Lagann!

[midori.means.green]

I think Dango Daikazoku is my all time favorite anime song, though I never even watched Clannad. But I've listened to Dango Daikazoku for years.

I also love What's Up People? from Death Note.

FMA has great music, this is my favorite : http://www.youtube.com/watch?v=FmHEBG0xaME

Also, I like the third Gintama ending (again, I haven't watched the series at all ) http://www.youtube.com/watch?v=GgBDZBphGPI

And I love the soundtracks Joe Hisaishi makes for Miyazaki's movies.