I like this drama so much. I got hooked at the first episode. Its genre was Action/Thriller/Suspense/Medical/Science-Fiction/Fantasy/Romance Drama. I like its romance although it was slow. This couple never broke up; never heart breaking , ... They loved each other truly and they supported each other till the end. Their chemistry was sweet. The plot was very unpredictable. That's why I liked its story. Also the story was full of moral, humanity and most importantly, Blood is brimming with life philosophies. Add to this the other invaluable life lessons that may be culled from the drama. To name a few, faith in God during adversity, compassion or empathy for the sick and dying; fleeting nature of life and vain things like power and money; moral science or the upholding of the ethics and standards of one's profession. Although Park Ji Sang was a vampire, he proved that he is more human than anyone around. Its villain was the best one I have ever seen in K-Dramas. He was so bad, really bad and he was so mean and wicked. He kept getting on my nerve in whole drama! :D Acting was very good too. Although Ahn Jae Hyun acted awkwardly in early episodes, he kept getting better and better episode by episode. And finally he nailed his character! :) It is obvious that he tried hard for this drama. :) The best actor in this drama is definitely Ji Jin Hee. He acted awesomely and I really hate his character in this drama. :D I truly commend him for his great acting. Goo Hye Sun was so good too. Her facial expression was very unique in this drama. I praise her for her good acting. Dialogues in this drama was so meaningful. Like "A hero dies for the person who recognizes that he is a hero. OSTs were good too. It is really worth to watch and re-watch it again and again. Lesson: never judge a drama by watching a few episodes or by listening to others' opinion about it. This is a very different K-Drama with different story. It has no love multi-angel. If you like hot romance with push and pull; if you like predictable story; if you don't like thrill, murder and sadness and tragedy in dramas, DO NOT WATCH THIS DRAMA AND PLEASE DO NOT BASH IT BECAUSE IT DIDN'T END AS YOU PLEASE!!! Watching this drama needs high comprehending and being meticulous. Because it has lots of nuance. Oh! seriously, this drama does not deserve to be judge so harsh. Thanks for reading my review and please forgive me if I make you sad through my words.