Hiccup is chosen to kill the nightmare. No surprise there. But when faced with the choice between possibly loosing his best friends trust or getting the village to see the good side of dragons, Hiccup decides to say, goodbye Berk. It's not like they cared anyway. But, of course, a certain blonde Viking could always get in his way. 5 years later and maybe Hiccup decides it's time to return home. Or maybe, he was forced to make that decision.