It varies. Some character story quests can be completed in a couple of hours, while others might take longer depending on your playstyle and exploration.
It's hard to determine a single best story quest. 'The Story of Klee' is popular among many players for its charming and light-hearted narrative. Different quests appeal to different people based on their interests in the game's world and characters.
It depends on your preferences. Some people might find it amazing due to the rich story and immersive world-building, while others might have different opinions.
Character story quests in Genshin Impact don't have a fixed duration. It depends on factors like the quest's content, the player's gaming skills, and how much time they spend exploring and interacting. Generally, they can range from one to three hours.
In some cases, you can replay character story quests in Genshin. It might depend on updates or specific game features. Sometimes, they become available again after certain intervals or events.