For years, Shawn has told the story of Kat and Pryor in Gello Apocalypse. He's kept things fresh by letting the art and storytelling of the comic grow along with him, going from short black and white stories to long multi-part tales in color. Plus, he likes to have fun and experiment, trying out new sequential tricks.
Nick Marino, on the other hand, couldn't maintain his mojo on Super Haters. While the webcomic lives on as sporadic short stories, the long-term narrative became a drag. Nick got tired of the daily grind and the comics's constrictive format.
But burnout doesn't have to happen to you! When Shawn needed a kick in the pants on Explorers of the Unknown, he invited his friend Seth Fronzoli to join him as a co-plotter and scripter. He maintains his excitement by asking his collaborator to surprise him with the scripts.