Some Discord servers focused on Transformers fandom often have channels for fanfiction sharing. You can join these servers and look for the fanfictions in the appropriate channels. Additionally, checking out YouTube channels that review fanfictions might lead you to some great Optimus Prime x Cybertronian Reader fanfictions. They usually give links or at least mention where they found the fanfictions in their reviews.
One common theme is adventure. They might go on missions together across Cybertron or other planets. Another theme is sacrifice, where either Optimus or the reader character might be put in a situation where they have to sacrifice something for the greater good.
In a fanfiction, it could be interesting to see a scenario where Megatron and Optimus Prime are reborn in a different time and place, perhaps in a peaceful Cybertron that has long forgotten the war. They might struggle to adapt to this new world where their old identities as war leaders are no longer relevant. Their journey could involve rediscovering themselves and learning to live in harmony, which would be a huge departure from their traditional roles.
There's a fanfic titled 'Standing by Optimus'. In this story, the reader character has to face many challenges while trying to heal Optimus who has been severely injured. It's a very emotional read as it focuses on their bond. Also, 'A Helping Hand for Optimus' is a nice one. It's about the reader using their unique skills to nurse Optimus back to health when he's in a bad state.
A really cool Optimus Prime reader fanfic is 'Prime's Redemption'. In this fic, Optimus has to deal with the consequences of a major mistake he made during a battle. It's interesting to see how he overcomes his self - doubt and regains the trust of his team. Also, 'Optimus and the Human Alliance' is good. It focuses on the interactions between Optimus and a group of humans, showing how they work together against a common enemy.
Characterization is really important. Optimus Prime should be written true to his noble and selfless nature. The reader character also needs to be well - rounded, with their own goals and personality. In addition, the setting should be vividly described. Whether it's the desolate landscapes of Cybertron or the hustle and bustle of Earth in the Transformers' universe, it should draw the reader in. Good fanfiction in this genre also has moments of tension and resolution, like when they face a difficult battle or overcome a misunderstanding.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of RWBY fanfictions, and you might be able to find some with a male Optimus Prime reader insert. Another option is FanFiction.net, though the search might take a bit more effort as you'll have to filter through the results carefully.
There are many great Optimus Prime and Arcee love fanfictions out there. One popular one might explore their relationship during a time of great battle, where their love becomes a source of strength. Another could be a more in - depth look at how they first fell in love, perhaps during a moment of peace on Cybertron.
I really like 'Optimus Prime's Heart'. In this fanfiction, the author focuses on the internal struggles of Optimus while also developing a romantic relationship with the reader. It's a great read if you're into character - driven stories. Also, 'The Prime and the Reader' is quite popular. It starts with an interesting encounter between the reader and Optimus and then unfolds into a story full of mystery and love.
A really cool fanfiction I read had Female Optimus Prime and Megatron in an alternate reality. They were both outcasts in their own worlds. They formed an unlikely alliance and the story focused on their journey together. It was full of action and also some really sweet moments where they showed that they cared about each other's well - being, despite their past enmity.
Another aspect is the acceptance of differences. The human reader has to accept that Optimus Prime is not human, he has different values and a different physical form. Optimus Prime has to accept the fragility and short lifespan of the human. They need to work through these differences and find common ground. For instance, they both value justice and freedom. By focusing on these shared values and gradually understanding their differences, their relationship can develop in a believable way.