character analysis

In the begining of the film shaun is this very laid back, accepting no responsibilities in his life or really caring to progress. He has a girlfriend but doesnt seem to know what to do to try and keep things interesting, totally accepts and lives with a very mondane existance. Shaun doesnt have any inclination or care to grow up and do the things that needed to be done inorder for his life to be put back in order. After the zombie infestation shaun seems to grow up almost over, he accepts responsibility not only for himself but for everyone he knows and keeps most of them alive. Everyone in his life that was responcible and had plans in life suddenly had no idea what to do and followed Shaun who seemed to be the only person with a plan or idea of what needed to be done.