Family, friendship, politics. The plot is brilliant. You won't get tired of the storyline eventhou it mostly was about how to change & establish a new country. Every character have it's important role.
Both series have:
- Good swordmanship.
- Revolution of govenment. SFD (Goryeo -> Joseon), Tnk (Royal family -> Samurai family)
- Greed and hunger of the male lead for power.
- Lots of inspirations and moral values in politics and family.