Delinquent manga is an interesting genre and one of my favorites, there can sometimes be really funny works, like Angel desnsetsu or Kyou kara Ore wa!! , on the other hand there are some that are really good for the fighting Holyland
There are also a similar genre in manwha, although their stories tend to be a lot less romanticized and more about bullying and close ties to adult gangs.
So what are some delinquents manga/manwha you personally like?
I don’t consider Holyland a classic delinquent manga. It’s more fighting/martial arts than deliquent. GTO is kind of the same, where the focus isn’t with the delinquent lifestyle. I enjoyed both of those immensely, but I didn’t enjoy most pure delinquent mangas (only exception is GTO prequel). Part of it is the style. I typically dislike mangas that are gritty and rough.