If you liked
Suzumiya Haruhi no Yuuutsu
|
...then you might like
Sayonara Zetsubou Sensei
|
Abstract insanity in both of these classics, with Zetsubou being admittedly more "all-over-the-place" than Haruhi. Both contain great comic elements, and are highly entertaining.
If you liked
Hachimitsu to Clover II
|
...then you might like
Clannad: After Story
|
Clannad ~AS~ may actually be slower-paced than H&C II, with both being peaceful slice-of-lifes tinged with despair. Very emotional stories, truly masterpieces.
If you liked
Elfen Lied
|
...then you might like
Kanon (2006)
|
Both anime have the common theme of memory loss with dark undertones when the true nature of this amnesia comes to light. Both are powerful stories which leave one with a sense of wonder.
If you liked
NHK ni Youkoso!
|
...then you might like
ef: A Tale of Memories.
|
Both of these great shows draw upon the various restrictions that force one to live in specific ways, as well as the true motives behind relationships. While NHK!'s mood displays a wider spectrum, both anime were both entertaining and had some good life lessons.
If you liked
Toki wo Kakeru Shoujo
|
...then you might like
Higashi no Eden
|
When one is given the ability to live frivolously, their entire life is put in perspective. Both centre around the theme of being granted something precious but expendable, and the morality and choices behind how to use this thing. Both great shows with a sense of mystery.
If you liked
Koi Kaze
|
...then you might like
ef: A Tale of Memories.
|
Both involve a theme of forbidden romances, or the want to protect one from the pain love can cause. While ef is more abstract in conveying deeper themes than the brutal honesty of Koi Kaze, both have a deep impact.
If you liked
Koi Kaze
|
...then you might like
True Tears
|
I feel Koi Kaze is extremely underrated on the site, largely due to the widespread ignorance over the depth of the themes covered in this anime. While Koi Kaze is undoubtedly better in every aspect, for those looking for a lighter, less honest anime involving forbidden romance may want to turn to True Tears. While I wouldn't normally recommend True Tears, it is an entertaining preemptive before watching more mature anime.
If you liked
Cossette no Shouzou
|
...then you might like
ef: A Tale of Melodies.
|
Both anime have dark undertones, with Cossette's being more apparent most of the time. While ef is more refined in artwork and storytelling, both are conceptually very well executed, and deal with dualism of relationships past and present.