It depends on personal preferences. Some might think the Blue Lions' story is the best for its focus on honor and loyalty. Others might prefer the Golden Deer's story for its strategic elements.
The story of Fire Emblem Three Houses can take a significant amount of time to complete, depending on your playstyle and how much you explore. Roughly, it could take around 50 to 80 hours.
Fanfiction about the 'Duality of Man' in 'Fire Emblem Three Houses' can be really interesting. It might explore the different sides of the characters, like how a seemingly noble character could have a hidden dark side or vice versa. It could also look at the moral and ethical dilemmas the characters face due to their dual natures, adding more depth to the existing story.
One great Edelgard fanfiction is 'Edelgard's Ascent'. It delves deep into her character development, showing her struggles and her determination to bring about change in the world of Fire Emblem Three Houses. The story is well - written with great attention to detail about the game's lore.
It's hard to say for sure. Different players have different opinions. Some might think Edelgard's story is the best because of its complexity and depth.