I love how mouthy Merlin is to Arthur. Or, to everyone in general. :) Even though Arthur is the prince and could have merlin punished for his witty quips, Arthur just takes it because he knows that merlin is really his closest friend.
I honestly don't get why teachers think making the students that muck around and don't do anything sit next to the nerds (me) is going to magically do anything. Generally the kid that doesn't do anything just copies off the other one.