Probably the 3-parts movie 5 cm per second, directed by Makoto Shinkai; awesome music.
Then comes BECK, whose band songs played along the anime are really really good and I still listen to them frequently on my mp3.
Also Mushishi had some good songs too; the opening's was great.
Bleach has really good opening and ending themes, same goes for Naruto..
Elfen lied had a brilliant OP; Lillium, but the rest of its soundtrack was meh.
My favorite right now is Macross Frontier's Soundtrack, The Sheryl and Ranka songs in the anime so far are excellent as is the OP(Triangular) and the ED(Diamond Crevasse), also Ranka's new single from episode 12 has really grown on me :3
Bebop did have a great soundtrack, especially "Space lion" and "Road to the west".
NGE aswell had a really good soundtrack, "Komm susser todd" and "Pachelbel's Canon" from End of Evangelion and "Suiten Fur Violoncello" from Death and Rebirth, Loved the OP "Zankoku Na Tenshi No These" aswell.
Ninja Scroll. For me, the best! It, in fact, has some of the nicest AMV and likewise adaptations.
I liked most of Tsubasa Chronicle's music. Both the OP were great, and the INs were also awesome. Most of the BGM were just full of win <3.
That goes for anime, OAV and movie.
Katekyoushi Hitman Reborn has had some nice OP/ED. The BGM aren't worth noticing, I think. =/
Tengen Toppa Gurren Lagann.
well theres beck,elfen lied with its beautiful op,cowboy bebop.........
ok is the question about the music in the anime or the op & ed or both?????
cause theres a pretty good amount of anime with good music.
my personal opinion is that all of D.gray man op are good
Cowboy Bepop and Trigun have the best op/ed...
For the Music BECK is unbeatable
bleach.... orange range rocks LOL