 If you liked
Otaku no Video
|
 ...then you might like
Top wo Nerae! Gunbuster
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While the stories aren't especially similar, these anime both exist as the result of a love for 70s and 80s mecha and space opera anime by the founders of studio Gainax. You can clearly see the inspiration, references, and homages to influential anime such as Macross and Mobile Suit Gundam that started the anime otaku subculture. If you are interested in that kind of stuff, you will probably appreciate both of these anime.