Sasuke's story wraps up in the final arcs of Naruto Shippuden. It's a complex and emotional ending that ties up his character development and relationships.
A really interesting fanfiction could be set in an alternate universe where Sasuke never left the village in Naruto Shippuden. He and Sakura start to develop feelings for each other much earlier. They go through all the challenges of being young ninjas together, and their relationship blossoms as they face various threats to the village side by side, and they eventually get married and have a family.
One popular storyline is about Naruto and Sasuke teaming up against a new, powerful enemy that threatens the entire ninja world. In this type of fanfiction, they put aside their differences and combine their unique skills, like Naruto's Rasengan and Sasuke's Chidori, to defeat the foe.
A good fanfiction about their kiss should have strong character development. It should show how Sasuke has grown to open up to Sakura and how Sakura has patiently waited and supported him. Their kiss should be a natural progression of their relationship.
Well, a plot could involve Sasuke returning to Konoha and Hinata being assigned to work with him on a mission. Hinata is nervous at first but also determined. As they face challenges together, Sasuke realizes Hinata's strength. They start to trust each other more and more. Sasuke begins to understand Hinata's loyalty to Naruto in a different way and Hinata sees the pain that Sasuke has been through. This mutual understanding could lead to a deeper bond between them.
A common theme is the exploration of their different personalities. Sasuke is often brooding and focused on his own goals, while Sai is more of an enigma at first. Fanfics may focus on how they come to understand each other better.
One possible plotline is that Sasuke and Hinata are sent on a diplomatic mission to another village. Along the way, they encounter various threats and have to work together to overcome them. This would allow for their relationship to develop as they see each other's skills and personalities up close.