If you liked the Sayonara Zetsubou Sensei anime, the Anime-Planet community thinks you'd like:
When the last two remaining members of the Ghost Tribe died, they left with them Kitarou - a one-eyed ghoulish child with a sinister cackle and a penchant for the supernatural. From day to day Kitarou tries his best to fit in at school (while failing miserably), thwart the fiendish schemes of the crude and rude Rat Man, and get the attention of the lovely and kind Neko Girl. with the help of his father-turned-talking-eyeball and his nervous and confused caretaker, Kitarou must learn to be the best Ghost Tribe heir that he can be!
Absolutely gorgeous to look at, and frequently rather dark comedies - SZS pulls no punches and wants a constant stream of laughs (whether it succeeds is another matter) while Hakaba Kitarou may just elicit the odd evil little smirk, but they're both completely worthwhile watches.
Haré and his mother live peacefully in the jungle, until one day the boy is overtaken by a omnipotent shadow. Later, he awakens to find Guu, a strange girl with even stranger abilities - notably, the ability to switch from a cute, lovable Guu, to a menacing delinquent who eats everything. Now Haré must live with Guu, and lead a normal life, despite her oddities.
both contain very funny and crazy events created by very funny,weird and crazy characters sometims having deep meanings and sometimes completely lunatic with no explanation except that sayonara sensei is a dark psychological comdey while hareguu is a pure fantasy comedy
Yuno is a high school student who dreams of becoming a famous artist; and after being admitted at Yamabuki High School of Arts, she is one step closer to her dream. Yuno must move to an apartment complex near the school, and there, in Hidamari-so, she meets three new friends: Miyako, a very active person who will do anything to get her hands on something to eat; Hiro, an upperclassman who is obsessed with weight gain; and Sae, the oldest of the bunch and also a tomboy. From wild cosplaying teachers to bizarre school myths, Yuno and friends enjoy fun times and crazy days at Yamabuki High!
Here is a great comparison, these titles were of course made by the same crowd, and it does show both visually and in the telling of the story. Visually, the use of texture, pattern, and character stylization are similar. The use of sounds is also similar, with random sound effects (game-show tones, baseball-bat clangs, etc), or random silence, provided to punctuate jokes or accentuate a character's reaction to something. The main difference is that Hidamari Sketch ends up feeling more relaxed and mellow in its pace, and it intentionally gives the viewer that "warm and fuzzy" feeling when its all over, whereas SZS presents more frenzied vision, that is meant to be a little more unsettling and/or confusing in the end.
In present-day Japan, Toshihiko Momota is member of a secret warrior faction called the Kifuuken. The Kifuuken is dedicated to destroying Shokujinji - humans that turn into man-eating monsters when hunger takes them. However, to fate's chagrin, Momota meets and quickly falls for Yuka, a Shokujinji herself! Will their love be able to overcome Yuka's insatiable appetite for human flesh, or will the couple be destroyed by the bestial tendencies of humanity?
In terms of plot Kemonozume and Sayonara Zetsubou Sensei have nothing in common - but their chief concern is hardly their narratives. Both are brimming with dark humour (with sometimes morbid punchlines) and stylish, ingenious animation. Zetsubou Sensei is a straight comedy while Kemonozume has elements of drama, and Kemonozume is by far the darker and weirder of the two, but generally they go together fairly well.
When the students of class 2-A at the all-girls Mahora Academy head back to school, they are expecting a new year as usual. What they get is a new homeroom teacher... who's 10 years old! As if being a genius isn't enough, Negima is a mage. As part of his training to be a Magister Magi, he must succeed at teaching - without anyone finding out he's a magician! Can Negi keep his talents a secret from the girls who just adore the cutest new addition to their academy? Through demon attacks, magical enemies, and English tests, Negi will put all his talents to the test to be the best teacher he can and achieve his goal of Magister Magi.