Finishing a bad or uninteresting book might feel like a chore, or at least unsatisfying, but it's nothing like playing to the end of a game you don't care for. Why do so many still choose to do this?
True/Slant's Modus Pwned doesn't understand it either. Breaking a game down to its utilitarian purpose, the thing is meant to be fun. If it's not, what is the point in continuing to play it?
Dave, one of Modus Pwned's two writers, can't really answer that question. a Ph.D student in moral philosophy, however, he does point out some of what he considers the compulsions to continue to play - notably, 100 percenting a game or racking up its achievements.