Great teacher onizuka is a ambiguous manga. It's comical, but also give the importants values of life.
The story is overstated, but anyway explain really good the Japanese society and their problematics.
At the start much characters are Onizuka's enemies(the skirmishs among Onizuka and Hiroshi Uchiyamada are very fabulous). The Onizuka's enemies are repressed and hate the attitudes of Onizuka, but him aniway always continue for the own path.
Onizuka is the one best manga characters. It's the teacher that all would have. The stupid expressions of Onizuka are great, and the personality is comic and matured at the same time.
The design is good, expect for the face that are all similar.
It's a absorbing manga, reccomended for all.