One interesting story could be about the Ginyu Force having to adapt to a new planet with strange gravity. They struggle to perform their acrobatic combat moves at first but then find unique ways to use the gravity to their advantage.
In some Ginyu Force fan fiction, new original characters are introduced. These could be characters from the planets that the Ginyu Force has invaded or characters created specifically for the fan - made story. These new characters can add new dynamics to the story, whether they are allies or enemies of the Ginyu Force. They can also help to explore different aspects of the Ginyu Force's personalities and motives that might not be as well - explored in the original series.
Another interesting plot could involve the emotional aspect. Suppose he changes into a body that has a family or friends. He would then have to deal with the relationships associated with that body. He might find it difficult to fit in and pretend to be the person who originally owned the body, leading to some comical or even heart - wrenching situations.
Well, if Nappa turned good, it'd be a huge twist. He could end up teaching the heroes some powerful techniques or sharing insider info on the villains. It'd definitely shake things up!
Frieza turning good in fanfiction would be a major game-changer. It might involve a character arc where he realizes the error of his ways and strives to make amends, adding depth and complexity to his persona.