If you liked
Suzumiya Haruhi no Shoushitsu
|
...then you might like
Seishun Buta Yarou wa Yumemiru Shoujo no Yume wo Minai
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if you're a spinoff movie for a popular science fiction/slice of life/dramedy anime series about emotional high schoolers dealing with supernatural events and your plot relies heavily on time travel paradoxes raise your hand
If you liked
Danganronpa: Kibou no Gakuen to Zetsubou no Koukousei The Animation
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...then you might like
Kiznaiver
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Both anime mix serious, psychological questions with weird and funny situations. They both have a mismatched group of characters being forced into hard tasks by mysterious, unknown people. If you like one, you'll probably like the other one.
If you liked
Suzumiya Haruhi no Yuuutsu
|
...then you might like
Charlotte
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High school students with special abilities in a club trying to find more people with special abilities. Somewhat similar characters (Nao = Haruhi + Yuki, Yuu = Kyon + Itsuki). Baseball episode. Alternates between character-based slice of life and supernatural drama.
If you liked
Ouran Koukou Host Club
|
...then you might like
Baka to Test to Shoukanjuu
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It involves a really similar style of crazy humor, similar characters, the theme of an oblivious person with people falling for them, several of the same voice actors, and a fun plot line just like B&T, so you should definitely check it out.