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The most random detail from AtLA that stuck with me is how much more comfortable Zuko always seemed using his swords compared to his bending. Firebending is such a big deal in the fire nation; even if if he isn't as good with it as Azula (which no doubt contributes to his discomfort), having it is such a big privilege, and yet... Sometimes the gifts we're born with aren't the ones we're meant to use.