A less common but still interesting trope is the 'swap - powers' one. In some fanfics, Aang and Katara somehow swap their bending abilities for a while. This forces them to understand each other's strengths and weaknesses on a deeper level. It also leads to some really funny and heartwarming moments as they try to teach each other how to use their new powers.
The 'power - couple' trope is also quite common. Aang, as the Avatar, and Katara, a powerful waterbender, are seen as a formidable duo. Fanfics often explore how they use their combined powers to defeat enemies and save the world. Also, the 'misunderstanding' trope where they have a fight because of a miscommunication but then make up is popular. It adds drama and emotion to their relationship.
A really interesting fanfic I read had Aang and Katara having a disagreement over how to deal with a new threat. Aang believes in a more peaceful approach, while Katara thinks they need to be more forceful. This creates tension between them, but as they work through it, they realize that they need to combine both their ideas. It's a story that really delves into their characters and how they complement each other.
One great Aang fanfic could be one where he has to face an unexpected new threat in the Spirit World. It might explore his growth as the Avatar even further, showing his unique connection to the spirits and how he uses airbending in creative ways to overcome challenges.
One great Aang fanfic is 'Aang's New Adventure'. It takes place right after the end of the series. In this fanfic, Aang has to deal with some leftover Fire Nation rebels who don't want to accept the new peace. It's really exciting as it shows Aang using his bending skills in new and creative ways to bring about peace once again.
Another aspect is the relationships in the fanfic. Aang has important relationships with Katara, Sokka, Toph, and others. If a fanfic can develop these relationships in new and interesting ways, it's great. For instance, a story where Aang and Katara have a misunderstanding that they need to work through, which could test their relationship and show their individual growth as characters.
In Avatar: The Last Airbender, Aang and Katara's love story is a beautiful journey. Initially, they had different goals but were united by the need to save the world. Aang, being the Avatar, was a bit naive at first, and Katara was more mature. However, as time passed, Aang learned from Katara, and she was inspired by his determination. Their shared experiences, like fighting the Fire Nation, exploring different cultures, and facing personal losses, all contributed to their love. Katara's motherly side towards Aang also evolved into a romantic love as they both grew up, and in the end, they became a couple.
I really like 'Zuko and Katara: A New Bond'. In this fanfic, their bond forms as they face a new common enemy. It beautifully portrays their growth as individuals and as a duo. The author does an excellent job of writing their dialogues, making them feel very true to their characters in the series.
I liked 'Katara and Zuko's New Beginnings'. It's a fanfic that takes place after the end of the series. It focuses on how they navigate the new world order together. There are some really sweet interactions between them as they try to build a new life for themselves and their friends. It also has some great action scenes where they use their bending abilities side by side.
Many Aang fanfics offer unique takes on his powers. Some might show him learning new airbending techniques or using his Avatar state in ways that weren't shown in the series. This creativity in exploring his abilities makes these fanfics appealing to fans who want to see more of what Aang can do.
A good Zuko and Katara fanfic should first of all stay true to their characters. Zuko's complex personality, with his struggle for redemption, and Katara's strong - willed and compassionate nature need to be accurately depicted. For example, if Zuko suddenly acts completely out of character and is overly friendly right from the start without any build - up, it would feel wrong.
The setting and plot should tie in well with the Avatar universe. A fanfic that has them travel to different parts of the world, like exploring ancient Fire Nation ruins or hidden Water Tribe enclaves, can be really engaging. And of course, the dialogue has to be on point. Their conversations should be filled with the tension that comes from their different backgrounds and the new - found respect and friendship that develops over time.