I know it would seem that they had Jamie in mind, but there are lots of striking blue eyed well built men. It surely made casting the part in his favor. I think he is a really good actor and will bring a deeper level to the doctor. One thing that will be interesting to see his level emotion. I have seen him in another show where he showed emotion, his ugly cry is very funny.
The Dr Park character is right on the nose. Most people may not like him and may think very much of him. The Asian community is exactly like that. They have the most type A personality. In the Asian community failure is not an option. They would rather kill themselves then admit failure.
The other match pretty the way the book describes them for the most part.