I can honestly say that for me, it's between Koreans and Japanese. I've seen so many Japanese and Korean dramas more than I have seen Chinese. Everyone is different I guess; as supposed to their acting skills and how they look. It's kinda hard for me to choose. As long as I'm entertained while watching either Korean, Japanese and Chinese, and if the actors and actresses looks gorgeously beautiful and play their roles well, I have no complaint. :D