"When I'm writing the book I'm laughing at just how overblown the characters seemed. How full of himself he seems. But I didn't get far enough in the series to really drive the joke of it home"

This quote by Jhonen Vasquez talks to the creative process of writing a book. He is making fun of the characters he has actually developed, noting how loaded with themselves they appear. This is likely a reflection of his own creative process, as he is able to go back and observe the characters he has actually produced, and discover humor in their overblown characters. He also keeps in mind that he hasn't gotten far enough in the series to actually drive the joke of it home. This suggests that he is still in the process of developing the characters and the story, which he is still in the procedure of developing the humor of the series. It is most likely that as he continues to compose, he will be able to additional establish the characters and the story, and the joke of the series will end up being more evident.