I think it's really about some of our biological processes which helps keep us alive. I mean, our brains are hardwired to try and keep us alive. Seeking out old

I think it's really about some of our biological processes which helps keep us alive. I mean, our brains are hardwired to try and keep us alive. Seeking out old information you already know is not beneficial to improving your survival. New, particularly beneficial information can be. Thus, in order to help us survive, our brains evolved a reward system to motivate us to seek new information... to learn essentially. In other words, our brains motivate us to learn, as learning helps us to survive. Thus, novelty = fun and repetition = boring. But the brain is obviously imperfect. Games and many addicting things in modern life, can hijack and play on this particular process (even harmful things).