I agree with all your points, I haven't seen the Japanese version, but I already love this version. I hope we can start to see the romance between them soon!
This show is such an amazing gem! I love the romance they're hinting at between Shin Jae Yi and Kim Seon Jae! Everything you mentioned is totally right about why this show is so amazing!
Yes! After I started watching Asian dramas, I have now picked up the habit of lightly "bowing" to people. Also, I noticed that I started using spoons that are bigger in size to eat rices and other meals similar to Koreans.