If you liked the Sayonara Zetsubou Sensei anime, the Anime-Planet community thinks you'd like:
Negishi Souichi always dreamed of joining a trendy pop band, so that he could perform music like that of his idol, Kahimi Karie. In order to realize his dream, he decided to leave the country side and his loving parents to study in Tokyo. And after graduating, he does manage to join a band... but not the kind he was expecting! As lead singer of the death metal band Detroit Metal City, under the stage name Krauser II, he is made to perform loud songs filled with obscene lyrics - a far cry from the songs he used to write in school. But despite the fact that Negishi hates DMC's music, the Krauser side of him will do anything to put on a good show for his fans... even if it means making Negishi's life a misery!
It may not seem like the most obvious connection to make; Death Metal Bands and Suicidal High School Teachers. However, aside from both series having a slightly different style to that which you normally see in anime, the main reason I would recommend one of these series if you liked the other is the humour. Both Zetsubou and Detroit Metal City have quite a twisted sense of humour, and they both thrive off of the more negative side of life. add into the mix that the main protagonists in both of these series are fairly hopeless - one struggling to cope with his demonic alter-ego, the other strugling to cope with, well, pretty much everything! If you have a bit of a dark sense of humour and liked one of these series then try the other, the chances are that both of these will make you laugh.
F City, F Prefecture: the battleground where good and evil have finally chosen to decide once and for all who will rule the world…or at least that's the general idea! Neither side seems up for the task, as surviving the brutality of everyday life is enough of a chore. On the side of evil is the organization of Across, its only member the loudmouthed and abrasive Excel who struggles just to put food in her stomach; on the side of good, three disenfranchised, unemployed bachelors whose only pursuit in life is romance. Add in alien invasions, jungle warfare, and Mexican immigrant laborers to Japan, and this war doesn't seem likely to be ending soon!
Excel Saga and Sayonara Zetsubou Sensei are fast-paced, almost stream-of-consciousness, comedies. Both are marked by cinematographic in-jokes but, at their core, they are satires on the Japanese lifestyle and culture that take their assumptions to the extreme.
These series have plenty to offer fans of gag-based, self-referential comedy and those who enjoy black humor. So if you belong to either camp, there's always something to like.
Sousuke Sagara is far from the average high school student - not only is he highly trained in military tactics, he puts his knowledge to use in every single applicable situation (and even those nonapplicable ones.) So, when confronted with high school, he tends to turn average high school experiences into off-the-wall adventures. Love letters become terrorist threats and field trips become commando operations; his survival depends on the watchful eye of his best friend and classmate, Kaname. Together, they may just make it out of high school alive...
Bouth are random comideys that take place in a school setting and bouth have mentelly deturbid and lovebal main charecters that get into crazy situations. And bouth have a uniqe animation style and thems of getting of with life.
What do you do when the Emperor of Japan has been replaced with... an alien from Planet Octopus?! From intense motorcycle races to crazy machine inventors from Holland, from sea voyages to battles about emo trading cards, there's never a dull moment in the life of the bizarre. Join an eclectic cast as they are visited by a Ramen Fairy, are reincarnated over and over, solve cases like detective pros, and overall have a laughably ridiculous time!
I think you would like Sayonara Sensei also if you enjoyed Gag Manga or vice versa, they seem to have the same parody sense of humor. Random and making fun of Japan/ Japanese people in good spirit. Both make fun of idols, and cliched anime things. While Sayonara sensei has more of a story it follows if you can call it a plot. Gag is really just random block of stories.
Ever wanted to join an anime club but felt its geekiness would hurt your reputation? Sasahara feels your pain. Genshiken, the Society for the Study of Modern Visual Culture, is an organization of college otaku obsessed with anime, manga and video games. Their daily activities include holding impromptu cosplay photo shoots, braving the crowds and avoiding injury at doujinshi conventions, and tolerating harassment by Saki, a girl irked by her boyfriend's otaku-ness! It's a perfect match for Sasahara's interests, so why is it so difficult for him to join?
Both Sayonara Zetsubou Sensei and Genshiken are somewhat random and definitely include a lot of self-effacing humor. Here are some points to consider :