If you liked
Hoshi no Koe
|
...then you might like
Macross F
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The similarities in setting and sci-fi technology are striking, and it seems that VoaDS must have been a great influence when creating the world of Macross Frontier.
If you liked
Mnemosyne: Mnemosyne no Musume-tachi
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...then you might like
Kurozuka
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Both are mature anime with mature content that both cover the subject of immortality.
If you liked
Suzumiya Haruhi no Yuuutsu
|
...then you might like
Mahou Shoujo Madoka★Magica
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Both anime are parodies of already existing genres but executed in a very serious (and very good) manner. I felt the idea of 'a greatness that heavily impacts the world' was very similar, though the anime have a different feel overall.
If you liked
El Cazador de la Bruja
|
...then you might like
Canaan
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Both anime contain girls wielding guns paired with a less competent girl with subtext yuri content. Also plot development is similar; the reasons and motives of different people and organizations become clear as the anime progresses.
If you liked
Serial Experiments Lain
|
...then you might like
Mahou Shoujo Madoka★Magica
|
Both anime involve complex theories with strange organizations that mess with your mind (especially Lain). And even though both series have an entirely different feel (Madoka is more action-drama, Lain is more suspense-thriller), the endings are remarkably similar, and both are true works of art.
If you liked
3 Years
|
...then you might like
Oresama Teacher
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Both manga are about tomboy's that try to become more feminine and experience romantic love upon entering a new high school.
If you liked
Ga-Rei: Zero
|
...then you might like
Mahou Shoujo Madoka★Magica
|
Both anime contain action as well as drama, are about fighting 'evil things' and have a slight yuri touch to it. Basically, they both have the same 'shounen-meets-shoujo' feel.
If you liked
Higashi no Eden
|
...then you might like
Durarara!!
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Both are psychological/action anime about the influence of social networks and how they form communities amongst, and bonds between, people that don't know each other in real life.
If you liked
Mushishi
|
...then you might like
Kino no Tabi: The Beautiful World
|
Both anime are about a person who travels the world. Mushishi focuses more on beautiful storytelling, whilst Kino no Tabi is more about philosophical hypothesis.
If you liked
Gakuen Utopia Manabi Straight!
|
...then you might like
K-On!
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K-ON! and Manabi are both about five girls who are in a club together (the Light Music club and Student Council respectively). Even though K-ON! seems to be a lot more popular, I personally consider Manabi to be a lot better.