Ok but Zuko using the knowledge he acquired during his banishment to help him as the Fire Lord. Like making small talk with Earth Kingdom dignitaries about their local foods that he enjoyed and even misses. Like having in-depth conversations with his captains about sea currents and navigation. Like, in the middle of a meeting with several high-ranking naval officials, pointing out flails in security, like how a person can cling to a Fire Nation ship for hours at a time, or climb aboard using hatches on the upper decks, or disguise themselves as a lower ranking guard with easily accessible spare armour….

Though none of his experiences can prepare Zuko for the long, awkward silence that comes after he admits to doing or at least knowing something illegal and/or completely buck wild