Not sure if there is a similar thread. But here is the game
Have you ever wondered while watching a drama/movie that "If this role was played by Mr/Ms Y instead of Mr/Ms X then the drama would have been much better"
If so, then mention the drama name, the role, the actor/actress and the replacing actor/actress in your comment.
It can be the main leads or the supporting roles too.
For Example:
Drama: Rooftop Prince
Role: Crown Prince Yi Gak/Yong Tae Yong
Played By: Park Yoo Chun
Replace with: Park Bo Gum
I might have liked Rooftop Prince better if Park Yoo Chun's role (Crown Prince Yi Gak/Yong Tae Yong) was played by Park Bo Gum :)