Well, 'Sasuke's Early Days' is a popular one. It portrays young Sasuke's training, his thoughts during that time, and his dreams. It's a great read for those who want to understand more about Sasuke's early life and how it shaped him into the character we know later on.
One great 'Sasuke Young Justice Fanfiction' is 'Sasuke in Young Justice: A New Alliance'. It has an interesting plot where Sasuke's skills blend well with the Young Justice team's dynamic. Another good one is 'Sasuke's Journey in Young Justice'. It focuses on how Sasuke adapts to a new world and new allies.
I think young Sasuke would have a very intense reaction. He was so consumed by his hatred for Itachi at that young age. A Sasuke vs Itachi fanfiction would be like a trigger for him. He would be eager to see how the fictional fight is portrayed. If Sasuke in the fanfiction is shown as strong, it might fuel his own ego and make him strive even harder to become powerful. However, if the fanfiction shows Itachi as superior, it could enrage him. He might feel that it undermines his own goal of defeating Itachi and he might even want to find the writer to correct their 'wrong' view.
You can start by looking on Fanfiction.net. It has a large collection of fanfictions, and there are likely to be quite a few 'Sasuke Young Justice' ones there. Another place is Archive of Our Own (AO3). It has a great tagging system that can help you find the specific fanfictions you're interested in.
One common theme is revenge. Since Sasuke is driven by revenge in the original series, many fanfictions about young Sasuke explore his thoughts and feelings regarding revenge at an earlier age. For example, how it starts to consume him even as a young boy.
A fanfiction could also be set in a scenario where older Sasuke and young Naruto are accidentally sent to a different dimension. In this strange new world, they have to rely on each other to survive. Sasuke's calm and calculated nature combined with Naruto's boundless energy and optimism would make for an interesting dynamic. They'd have to find a way to get back home while also dealing with the unique challenges of this new dimension.
Sure. There are many great 'young Sasuke and Naruto' fanfictions that focus on their friendship and growth. For example, some stories might explore their training together at the Ninja Academy. These fanfictions often highlight their competitive yet supportive relationship as they strive to become better ninjas.
I would avoid 'lemon' fanfiction as it usually goes against the appropriate content guidelines. Instead, you can explore fanfictions that explore the emotional connection between Hinata and Sasuke. Some might be set in an alternate universe where they have different interactions compared to the original story. You can also look for ones that deal with how Hinata's gentle nature could influence Sasuke's more brooding personality in a non - inappropriate way.
There's 'The Unlikely Encounter'. In this fanfiction, the oc has a special power which draws Sasuke's attention. Their interactions are full of tension and chemistry. The author does a wonderful job of exploring how their relationship could develop in the Naruto universe.
Staying true to the Naruto universe's lore can be a challenge. There are many established facts about their relationship and abilities. If you deviate too much, it can feel out of place. For example, if you give Sasuke a power that doesn't fit with the chakra system in Naruto, it might seem off.
Another great one is 'Young Love: Sakura and Sasuke'. This story focuses on their shared experiences as young ninja trainees. It shows how their different personalities - Sakura's exuberance and Sasuke's brooding - create an interesting dynamic between them. There are cute moments of Sakura blushing around Sasuke and Sasuke's rare, small smiles in response to her.