He is also based on Larry David himself, and many of the most outrageous stunts he does in Seinfeld, David has done in real life. For example, George quitting his job just to regret it immediately and going back the next day as if nothing had happened, is based on Larry David doing exactly that as a writer on SNL. He made a big scene and quit, and just went back after the weekend and pretended like he'd been joking. Larry David is an interesting man to say the least.