Now the dramas that made a strong huge impact as a whole that gives strong morals too-
In Crime Thrillers-
Signal (This drama made me realize how blissful it is to live in present and to not have to live in your past)
Life on Mars (This drama made me emotional, because suddenly I also wanted to remember things about my childhood, I also wanted to go back in time and change some things.)
Missing Noir M (This drama made a huge impact on me the way it showed different sides of human ruthelessness.)
Children of lesser God (those children murder gave me a good lesson that never judge the book by its cover)
Romance-
The time we were not in love (idk this drama was so sweet and yet it gave me the moral of importance of saying some things rather than waiting and delaying it long and long. In the end, it'll only end up hurting you.)
Secret Life of my secretary (With low self esteem, I relate to the female lead so much, everything she did and earned in this drama, it made me feel happy for her and confident for myself.)
Another Miss Oh (Besides that hot memorable wall kiss, the personality of a female I loved so much, I still remember her from time to time.)
Dear my friends (Importance of having friends and life, this drama taught me the worth of both of them in such a beautiful way.)
Prison Playbook (The importance of having communication and human relations whenever you think your life is gonna end, and unexpected friends in your life, this drama made me understand everything that I never thought I need to understand to live my life. A masterpiece for me.)
Miss Granny (It's a movie, made me realize how lucky I'm to be still young and youthful.)
Our times (This movie made me feel so so poignant, it was a beautiful classic masterpiece for me though it was made in 2015).
There are many more but I feel like everyone have certain dramas that they can relate to much better than you can, and for them, those dramas become more impactful in their lives.
If you think carefully and properly, maybe you'll also get to see a drama which you didn't ever think you'd need to watch it so much unless you watch it yourself.