Character development. If the fanfic shows how Steven and Spinel grow as individuals and together in their relationship, it's interesting. For example, if Spinel overcomes her past traumas with Steven's help, it adds depth.
The emotional aspect. Fanfics that explore Spinel's feelings of abandonment and how Steven helps her heal are very engaging. Also, if it shows Steven learning new things about himself through his relationship with Spinel, it makes for an interesting read. For instance, a fanfic could show Steven realizing a new side of his compassion because of Spinel's unique situation.
The plot. A unique plot like them going on an adventure together in a new world or facing a new threat that only they can defeat as a team. It gives a new perspective on their relationship. Also, how the author writes their interactions, like the cute and awkward moments between them can make the fanfic really interesting. In some fanfics, their cultural differences (since Spinel is from Homeworld) are explored, which is fascinating.
One popular 'Steven x Spinel' fanfic is 'A New Beginning'. It shows an interesting take on how Steven and Spinel could develop a relationship post - the events in the show. It has great character development and a heartwarming plot.
Steven x Spinel lemon fanfiction is unique because it combines the specific personalities and backstories of Steven and Spinel in a way that is not seen in the mainstream narrative. It can offer a fresh perspective on how these two characters could interact on a more intimate level. For example, it might explore how their different powers or emotional traumas play into their relationship in a more sensual context. This kind of exploration is not part of the regular story, making it stand out for those interested in such alternative interpretations.
A really interesting plot twist in these fanfics can be when Spinel gets corrupted again, but this time Steven has to find a completely different way to heal her. It challenges his usual methods and tests their relationship. Another plot twist could be that Spinel starts to have dreams or visions about Steven's future, and she has to decide whether to tell him or keep it a secret. This can lead to a lot of internal conflict for Spinel and also affect her relationship with Steven in unexpected ways.
One interesting story could be where Steven and Spinel go on a journey across different planets together. They discover new gems and cultures, and along the way, they learn more about each other's past traumas and how to heal. Their friendship deepens into something more as they face various challenges.
The fanfiction 'The Crystal Gems and Spinel' also features a great relationship between Steven and Spinel. In this one, they work together with the Crystal Gems to protect the Earth from a new threat, and their friendship blossoms during the process.
A common plotline involves Spinel struggling to fit in on Earth, and Steven being her guide. He shows her the beauty of Earth and its inhabitants. This can lead to a deepening of their relationship as Spinel starts to trust and rely on Steven more. Another plotline could be Spinel having nightmares about her past, and Steven being there to comfort her, which further cements their bond.
The relationship in this fanfiction often explores themes of forgiveness and growth. Steven, with his nature of seeing the good in others, tries to help Spinel move past her pain. Spinel, who has been through so much, slowly starts to open up to Steven. It's a relationship that can be seen as a journey of two broken souls finding comfort in one another.
A Steven x Spinel lemon fanfiction is likely to be a work that explores a romantic or perhaps more intense relationship between Steven and Spinel in a rather spicy or detailed way. However, such fanfictions often deviate from the original canon of the story. They can be interesting in terms of exploring different character dynamics and emotions that might not be shown in the official series. But they also might not be to everyone's taste as they can sometimes push the boundaries of what is considered appropriate in the context of the original work.
Love and acceptance is another common theme. The fanfictions may show how Steven accepts Spinel for who she is, flaws and all, and how Spinel learns to love and be loved in return. This can be in a platonic or a more romantic sense, depending on the story.
In many Steven Universe fanfics about Steven and Spinel, their relationship can be complex. Spinel was initially a villain but had a tragic backstory. Steven, being his empathetic self, often tries to understand her. In some fanfics, they form a deep friendship. Steven helps Spinel heal from her past traumas, and Spinel, in turn, might teach Steven something about himself or the world around him. It's a relationship full of potential for growth and mutual understanding.