To tell the truth I don't understand why this drama has such a relatively low rating. I mean, yes, I know that it is dragged on, some secondary comic characters are simply weird but the hell, the story of the main characters, full of tension, drama, shadowy passions and the incredible charm of Lee Dong Wook and Lee Da Hae, is something really refreshing aesthetically. Also, I have to say that there're very few dramas I like with Lee Dong Wook but, however, because of his acting in Hotel King and Goblin, he became one of my favorite Korean actors. I must say that him suit so well intense emotions, that later I was enormously surprised by seeing him in Goblin: so good in a comic role (even more interesting then the lead there).
Talking about the story of Hotel King, it's not original but it's well acted and well showed, without all these awkward kisses and superfluous dramas of a girl (Lee Dae Hae is really capable of creating a bright and powerful role), although yes, some final episodes were dragged by the dramatic behavior of the main lead. However, the chemistry and charm of Lee Dong Wook and Lee Dae Hae (now much more mature then in My Girl and in a much more developed context), is really worth of seeing (just skip the secondary comic storyline) ;)