Zan Sayonara Zetsubou Sensei

- Set in a classroom - Absurdist humour - Large cast of regular characters all with different designs - Lots of puns - Everyday occurrences exaggerated to the extremes  

Both main characters are teachers. They have students that are almost close to them. Some are weird :). But if your looking for comedy, school, and some romance both of this animes are great to watch!. And that on Zan Sayounara Zetsobou Sensei the main character is in despair just like in GTO . Well kind of.. But if your thinking about it then WATCH IT!!!!!!!!! 

Welcome to the NHK! and Zan Sayonara Zetsubou Sensei involve a rather strange lead character that think in "unique" ways. The random insecurities of conspiracy and conformity are themes throughout both of the series. Zan Sayonara Zetsubou Sensei is more random and throws light on many political and misconceptional deeds while Welcome to the NHK! revolves around a smaller area. 

A marketing reminder that TV shows can have as much seasons as they want if: - They have clear, specific and devoting target market, (or broad, countrywide, audiences, aka. everyone, which these two are not) - They keep up with their original theme, but also adapt to seasonal theme. (Swimsuit episode, valentine episode, christmas episode, etc) Japanese shows do this very well. - Their first season did well, but following season did even better, and keep improving. If the following season do worse, the shows are destined to end, most of the time.