I understand that this manga is dubbed by fans and critics alike as a poor man's Gintama, and in many ways I agree. However, that can sometimes be an unfair comparison given that they both tackle the deconstruction theme quite differently. Gintama is straight up lampshading/lampooning and is more appreciated by hardcore otaku, while Sket Dance is straight up Shonen Action Comedy that just happens to have a similar gimmick. However, it is exactly the latter's tendency to stray into conventional Shonen Action Comedy waters that makes it accessible to younger otaku. Sket Dance is confident in it's ability to tell a story on it's own without having to rely on too much parody, hence the regular drama and shonen romance story threads.
It should be noted, however, that many of the gags can be repetitive, hence predictable. The storyline arcs also tend to fall into the genre traps that it so proudly makes fun, leading to tragically unintentional genre blindness for both the Sket Trio and even the mangaka.
But for all its flaws, taken as a stand alone manga, it is VERY entertaining and even the used gags can still induce laughs. The abrupt drama breaks, taken in context, also give this otherwise lighthearted sketch story an unexpected depth, and makes the characters more relate-able to its readers.