The DIALOG, man. What made us not easy to enjoy the Korean movies or the TV drama series, no matter how popular they are, is the stupid dialog. It's not the normal dialogs that we usually see in the Western movies, the dialog in Korean movies or drama series are not dialog between two characters or among several actors, but a monologue, a single person keeps talking to himself or herself, and such monologue is widely used to show those thoughts usually flow in one's brain. But Korean movies and TV dramas use such stupid monologue, a self-talking-to-himself(herself) to let the viewers, who in the eyes of the screenplay writers and the directors usually think the viewers are too stupid to understand what the characters in the movie or TV dramas are thinking. So most of the time in a Korean movie ( the Japanese movies and TV dramas also got such problem, but not as serious as the Korean's), talking non-stop to him(her)self, a monologue only mentally ill or born retarded, become the never-can-get-rid-of, must-have, even in self doubt scene so popularly used.
A dialog helps the viewers to understand the on-going of the storyline, the coming-up or developing scenarios or plots, but use monologue of one person keeps talking to himself or herself is just stupid and unnatural. When people start talking to himself or herself, it's a popular sign and common sense that the person who talk or murmuring to himself(herself) is reaching a deteriorating mental condition, he or she uses the mouth to carry out the thoughts in their mind or brain. It's a common symptom of aging problem. People under age 45 usually would not have such self-murmuring problem unless a mentally deterioration is underway.
But the Korean movies and TV dramas both pushing the uncontrollable talking to himself or herself a common habit to all the Koreans, no matter young or old, male or female, they all put their thoughts, their thinking in their mouths and blabbering out non-stop. If the Koreans got such talk-to-themselves problems when they are still young, even at teenage, I just could not imagine how such problem would become how serious when they become older and older.
We often saw some people talking to themselves in a supermarket or in the street, and we'd automatically consider them either too old or with mental problems, but not the Koreans, especially the Koreans in a Korean movie or TV drama, because to the Korean people, the monologue is indeed the dialog.
We've seen so many good Korean movies and TV drama series, almost all of them got such ridiculous talking-to-himself or herself. Dialog is a conversation, not a monologue, consciously, sub-consciously or unconsciously to show one's thoughts by mouth.
Tingnan pa