In some 'peter doesn't turn to dust fanfiction', the plot might revolve around a character coming to Peter's rescue at the last moment. This could be a character with unique powers or knowledge. They could use their abilities to reverse the process that would make Peter turn to dust. Or perhaps there's a magical or technological device that is introduced in the story that stops Peter from turning to dust. The fanfiction could then explore how Peter and the other characters deal with this new situation and what new challenges or opportunities it presents.
One place to look for such fanfiction could be Archive of Our Own (AO3). There are often unique takes on characters' fates in fan-created stories there.
In some 'peter is alone fanfiction', he could be alone in a strange new place. For instance, he's transported to a different dimension where he doesn't know anyone. He has to adapt, survive, and maybe find a way back home all by himself. This kind of plot can explore his character growth, his resourcefulness, and how he deals with the isolation in a completely unfamiliar environment.
One possible plot could be that Peter uses smoking as a way to deal with stress in a difficult situation within the story's universe. For example, if he's facing a lot of pressure at school or in a job.
One possible reason could be that Peter is really good at hiding it. He's careful with his actions and words around Tony, so Tony just doesn't suspect. For example, he always changes out of his suit before meeting Tony.
A plot could involve two Peters from parallel universes. They initially clash because they have different personalities or ways of doing things. For example, one Peter might be more introverted and scientific, while the other is more outgoing and action - oriented. But as they get to know each other, they start to work together to solve a common problem that threatens both of their universes. This could include fighting a super - villain who has found a way to cross between the universes. Another aspect could be that they discover some hidden secrets about their own identities or powers through their encounter with the other Peter.
One possible plot could be that Peter, feeling overshadowed by the Avengers, decides to play pranks on them as a form of 'bullying'. For example, he might use his web - slinging abilities to move their things around or cause minor annoyances.
If Anakin doesn't turn in fanfiction, the galaxy would be a much different place. The Empire may never rise. There would be no Darth Vader to strike fear into the hearts of the Rebels. The Clone Wars might end in a more peaceful and just resolution, with Anakin playing a key role in brokering a lasting peace between the Republic and the Separatists.
Maybe Peter doesn't like the way Steve is portrayed in fanfiction. Some fanfictions might deviate too much from the original character, and Peter prefers the official version of Steve.
Peter might not be a fan of the genre of fanfiction in general. He could prefer original works and find fanfiction, especially about Steve, to be unoriginal or too derivative. Also, it could be that he has had some bad experiences reading poorly - written Steve fanfiction in the past that has put him off completely.
One possible plot is that Peter plays guitar to earn some extra money on the side while keeping his Spider - Man identity a secret. Another could be that he uses his guitar skills to attract the attention of a love interest. Maybe he plays a song that has special meaning to them.