First, consider Jake's motivation. In the beginning, it's mainly about getting a new chance at life through the avatar program. As the story progresses, his motivation should shift towards protecting Pandora and the Na'vi. His character arc should also include his relationships. For example, his relationship with Neytiri can be a big part of his growth. He goes from being an outsider she is wary of to her partner and a respected member of the Na'vi. Also, his interactions with the other Na'vi clans can shape his arc, as he learns to be diplomatic and inclusive.
One great fanfiction could be about a female character who meets Jake Sully during his journey in Pandora. In this fanfic, she might be a healer in the Na'vi tribe and their relationship could start as she helps him understand the ways of the tribe better. They could share cultural exchanges and gradually develop a deep bond.
Love and relationships are also a big theme. It could be a romantic relationship that develops between Jake and the female character. This relationship is often set against the backdrop of the conflict between humans and the Na'vi. Their love has to overcome many obstacles like the differences in their species and the war that's brewing. It adds a lot of drama to the story.
One plot idea could be Jake Sully having to face a new, unknown threat in Pandora that is not related to the RDA. Maybe a strange disease starts affecting the Na'vi and Jake has to go on a journey to find a cure. Another could be Jake having to deal with a power struggle within the Na'vi clans. A third idea is that Jake discovers a long - lost Na'vi tribe that has a completely different culture and he has to figure out how to integrate them with the rest of the Na'vi.
Love and attraction is also a big theme. Many fanfictions explore how Neytiri might gradually fall in love with Jake despite their differences. It could involve how she overcomes her initial doubts and comes to appreciate his human qualities.
You can try looking on fanfiction websites such as Archive of Our Own (AO3) or FanFiction.net. These platforms have a large collection of fanfictions on various topics, including Avatar - related ones like 'neytiri sees human jake sully' fanfiction.
There might be a fanfic that focuses on Jake Sully's early days in his avatar body. It could explore how he was adjusting to his new form, his interactions with the Na'vi during that time, and his first impressions of Pandora's unique environment.
A popular one is 'Jake's Redemption'. This fanfiction focuses on Jake making up for some of his past mistakes. It has a lot of action and emotional moments as he tries to right his wrongs and prove himself to the Na'vi once again.
Another theme is Jake's growth and development from a female - centered view. Writers often focus on how he changes and adapts in different situations that are important to female characters in the story. For example, in some fanfictions, his relationship with female Na'vi and how he learns from their culture and values. It gives a different dimension to his character compared to the original movie where the focus was more general. Also, themes of heroism from a female - perceived angle can be found. How female characters view Jake as a hero or the challenges he faces in being seen as one in their eyes.
Another interesting point in Jake Sully x Tsu'tey fanfiction is the potential for adventure stories. They are both brave and capable warriors. Fanfiction could take them on new quests or challenges that weren't shown in the original movie. Maybe they have to face a new threat to Pandora together, and through this shared experience, their bond becomes even stronger.