Que Sera Sera has gotta be one of the best under-rated Korean dramas out there. The plot and the story are not exceptional, but the excellent acting, screenplay and characterizations make this drama stand out. And what seals the deal is the ending. One of the best Kdrama endings in my opinion. The conversion of the bad guy into a human with emotions has been portrayed meticulously through the various ups and downs and twists in the plot. All the characters with their human flaws and shortcomings will leave a permanent impression on you. Rewatch value is less though, since one wouldn't want to experience all the angst that the leads go through once again.