If you liked
Suzumiya Haruhi no Yuuutsu
|
...then you might like
Hyouka
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Both Hyouka and Suzumiya Haruhi no Yuuutsu (The Melancholy of Haruhi Suzumiya) feature at first reluctant protagonists who grow through trying new things and going along with the group. Houtaro Oreki is a young man who has a policy of energy-saving, until he meets Chitanda and his world turns upside down. Kyon, at first reluctant to go out on the tangents of Haruhi Suzumiya, eventually finds himself not only being able to put up with the adventure, but loving every minute of it. All in all, these two anime are very similar and I would recommend them both.
If you liked
Black Lagoon
|
...then you might like
Baccano!
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Both Baccano! and Black Lagoon have some of the best gun action out there. The fight scenes never get old. They also both have a somewhat psychological facet and will almost always keep you on the edge of your seat.
If you liked
Tokyo Ghoul
|
...then you might like
Zankyou no Terror
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Both Zankyou no Terror and Tokyo Ghoul illustrate a story on both sides, rationalizing what would otherwise be a villain while keeping the "good guys" good guy, showing that every conflict can be looked at from at least two perspectives.
If you liked
The iDOLM@STER
|
...then you might like
Shigatsu wa Kimi no Uso
|
They both, while executing it in very different ways, use the pretense of music for deep character development. They also have a similar style of comedy, although in comparison, The iDOLM@STER is a bit toned down. Also they give compelling stories that use music as a catalyst to give these characters meaning.