Three key words I think could describe the King's Avatar : Fresh, Entertaining and Glory!

The sory is original, unique and modern. It is also very well written, from the begining to the end. I truly enjoy the idea of a top egamer being forced to leave his company and being/working on his own. I also appreciate the fact it also portrays other aspects of life and values which are not to be forgotten like family (near the end with the grandpa it made me cry so much), friendship, goals, and also what I find interesting the topic of age gap.
The actors and actresses did a very good job. The main actor Yang Yang did a brilliant job ! I truly appreciate his acting in this drama !
The music is also great, honestly the OSTs are superb it attracts me where it want to attract me!

Overall, I highly recommand this drama, at least for its originality (the story), for its acting (mostly for the main actor I promise you will not be disappointed by him), for its values, for its music! I am re-watching it for the second time, I can't get over this, it is super good!