If you liked
Heppoko Jikken Animation Excel♥Saga
|
...then you might like
Koukaku no Pandora
|
Same original creator (or co-creator in KnP case) Same weird vibe and spastic humour Many characters share similarities in appearance and personality. Sexual references and dirty gags in both besides ES is more lighthearted and episodic while KnP is a bit more serious and have something that resembles a plot but still episodic, in short, two enjoyable "turn off your brain" comedy shows if you like that stuff.
If you liked
Otaku no Video
|
...then you might like
Shirobako
|
Both series talk about making anime and the culture that surrounds it, both series focuses on friends trying to complete his projects and leave their mark on the world and both series references important shows for japanese animation but Otaku no Video is more focused on the anime fandom while Shirobako is focused on the people that make anime.