If you liked
Kenpuu Denki Berserk
|
...then you might like
Shingeki no Kyojin
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Both anime are quite horrifying and have some great characters; many of which are absolute badasses. Both have a similar supernatural role in them--whether that be demons are titans. If you like one of them, you'll most likely enjoy the other because of similar dark themes and surprises.
If you liked
Monster
|
...then you might like
Kenpuu Denki Berserk
|
Both have some incredible villains, and both of the manga are extremely popular and sought after. They are both character driven, and ALL of the characters are easy to love. Neither are science fiction, and take place in varying levels of the past. Also, for either anime, prepare yourself for the ending. Without saying too much, your mouth will probably be agape by the time you're finished with either anime. Enjoy!
If you liked
Death Note
|
...then you might like
Kiseijuu: Sei no Kakuritsu
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Both have very interesting plots that are thought-provoking. Both anime are REALLY good and are a big name for a reason. Both are great from beginning to end. Both have some hilarious moments in them!
If you liked
Death Note
|
...then you might like
Code Geass: Hangyaku no Lelouch
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These are definitely good successor's of each other. They both have really cool supernatural powers in them. In addition, the main characters are in a moral gray. They are both very good, so if you like one, you'll probably like the other.
If you liked
Dragon Ball Z
|
...then you might like
One Punch Man
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Both anime feature overpowered characters and are both humorous. All the characters are lovable, the fights are great, and the villains are just as good. The major difference is that OPM is a parody and shouldn't be taken seriously while DBZ is a more serious show. It's clear that OPM got inspiration from DBZ.
If you liked
Monster
|
...then you might like
Death Note
|
Both have very dark themes but also have moral grays. What really is the right thing to do? And, how can one resolve something that seems impossible to resolve? They are masterpieces that deal with the psychological and will (hopefully) deeply move you. They also feature some of the greatest villains in all of anime (in my opinion, obviously).