This is really funny show and I like how the main character is not an entirely pure-minded person. I feel too much nowadays people a re afraid to make protagonists that are really not great people without giving them some sort of redemption arc. Onizuka is a pervert and a rude idiot but it adds to the charm of the show and I like that he stays that way.
The art is so funny and so is the show and Onizuka himself, and his interactions with the students as well.
I just wish that Onizuka would have sometimes have actually faced consequences for his actions. At first I didn't mind but it's not as fun to watch him and his dangerous antics while knowing "it's not really dangerous, there are no stakes, he is not risking anything".
Otherwise I really recommend watching it.