Although it has been probably been a year since I watched S1, I do not remember it leaving such an impact on me. I connected much more with this season, with the characters and the trauma cases they had. But in general, the goodness of the seasons are pretty similar.

There are a few shortcomings to this season and its plot, but it certainly did not overwhelm all its great aspects. First of all, I believe it was highly character driven. It was obvious that SuSam, Eun Tak Sam and Mr. Jang got much more screen time this season because they were loved and appreciated and I generally enjoyed their parts.
Something I was very happy about in this season is that Kim Sabu is much much much softer. In the first season, I found him frustrating and unrealistic many a times. After having been through that, I believe he now understood that it is much better to communicate with people. He always gave well-headed comments and feedback. I was satisfied with his role and happy how he got along with everyone. It makes him deserve all the love and respect he receives. Although he pushes himself too much, and does not treat himself the same way he treats others, it seemed okay.

As many people have stated, this is not a romantic drama, the main couple really put off their relationship for as long as possible, and when they got to it, it seemed fake and very untouching. He liked her from their university days, and I believe his love for her didn't change much. She acknowledged his interest from the beginning, and she acts upon it, but I didnt see her once even looking like she actually likes him romantically. I am not sure if it's the character's way or the actress's. Honestly, Lee Sung Kyung acted in the exact same way as she acted in Kim Bok Joo, and even though it's probably her charm, in my opinion she acts with her face. All cutesy and pretty all the time. She is very conscious of how she looks, and what her face is like, so her expressions are somehow much more external. I am no expert, but it's the style of acting pretty people tend to have more. (Ex: Lee Dong Wook).

On the other hand, baby boy Ahn Hyo Seop was very in touch with his character's emotions and background. He was always tearing up and having all these tiny expressions swell up from inside, and that made me feel like he was a wonderful actor. I enjoyed watching him throughout the drama, especially when he cared and worried about Kim Sabu.

Lastly, Park Min Guk was the most relatable character to me. From the beginning, it was obvious he is a good man internally. He wasn't the blind, stupid villian like Dr. Yang and Do Yoon Wan. It's just this man has studied hard, and worked hard to build a name for himself, and he knows people have great expectations for him. But then he is torn between his inner voice of conscience, and people's view of him. It seemed like he truly is a weak and soft person on the inside, and he can in no way battle Kim Sabu, and no matter how much he realized it, he tried to still fight back. Problem is, he was fighting in all the wrong ways, and heading into the wrong direction because of Yoon Wan and whatnot. I really wished the writer redeemed his character earlier than that, and gave him more chance to show his true self. I loved seeing him taking responsibility and being a true doctor. It was such a huge and sudden jump that he also aims to turn the hospital into a trauma center. As an actor and a character I believe he deserved a bit more redemption. When he came back into his office crying, I felt happy to finally see him like this, but also very torn because he is just a very good person with very bad decisions. I hope I get to see this character in more main roles in the future.

Do I wish for third season? Not really. But I would still watch it if it comes. I really hope they pay more attention to the plot and leave Do Yoon out because I am sick of him.