1 Daniel thinks it's a great fun to share a room with a person his age because in that case he can do whatever he wants and not only what his parents want him to do.
2 Daniel doesn't understand why his parents make such a fuss about tidiness.He's annoyed by all of the washing up and cleaning.
3 I think he is a normal, ordinary rommate like most of teenagers. Teens actually don't care much about tidiness of their rooms.