I love his mindset of wanting to know more about the world and the relationship he developed with Athelstan made him who he was. Absolutely a top show of mine if not my favorite. Its no breaking bad, BCS, or Fargo, its just one of those shows thats such a great watch. One of my favorite scenes is when and him and King Ecbert argue about Heaven and Valhalla, hilarious but awesome.
Had to:
Absolute classic of a scene. Any discussion between those two is always on another level.
My favourite is Ragnar's speech when all his guys are failing to invade Paris. «Not you, not you, not you and not you!»