I would say that Legend of the blue sea is probably my favorite romance drama.

Story: The writer did really great in writing out each character's decision when progressing the story. The story didn't have a break up due to some stupid reason compared to other dramas. However, the leads chose to make a decision whichever future is best for them.
Moral of the story: Being different will never be an excuse when it comes to love.

Acting/Cast: The perfect match with Lee min ho and Jun ji Hyun. You can expect some exceptional chemistry between the two leads that makes you screammmm.

Music: The music lyrics may be cringy however with it playing it the background it helped made the story the intended feeling for the audience.

Overall I would definitely rewatch this drama.