I found an ATLA fic I really enjoyed recently, it's another take on the Water Tribe Zuko trope that I think works really well!

Love Runs Deeper than Blood by HanukoYoukai

Ursa adored the boy. Iroh doted on him. Azulon would coo at the child when he thought others weren’t watching. Even Lu Ten, who often declared the baby boring, would play with Zuko near the turtleduck pond. No, it seemed Ozai was the only one who saw what a disappointment his son was.
No matter. His problem would be dealt with by morning.
A Water Tribe Zuko AU.