Love is a very common theme. It could be a romantic love between Reid and the reader, showing how they overcome differences and build a relationship. Another theme is friendship. Since Reid is part of a team, stories often explore his friendships within the team and how the reader fits into that dynamic.
Mystery is also prevalent. Given Reid's work in the BAU, fanfictions often incorporate mystery elements. The reader might get involved in a case with Reid, and they solve it together. This adds an exciting aspect to the story. And of course, there's the theme of personal growth. Reid has his own traumas and issues, and fanfictions sometimes focus on how he and the reader help each other grow as individuals.
Love and acceptance are also common themes. Since Reid is a bit of an outsider in the show, fanfics might show how the reader character accepts him completely and they fall in love. There's also the theme of Reid's past traumas and how the reader helps him heal. For example, in some fanfics, the reader is there for Reid when he has nightmares about his mother's illness.
One of the most popular themes is solving mysteries together. Since Reid is a genius profiler, having the reader character be involved in the crime - solving process creates an exciting dynamic.
One common theme is his vulnerability. Reid is often portrayed as a brilliant but fragile character in these fanfictions. Another theme is the impact of his past traumas. His childhood and previous cases' experiences resurface to haunt him. For example, in many fanfictions, his time in prison or being kidnapped can be a recurring element.
One common theme is the struggle to balance work and family. Since Reid has such an intense job at the BAU, in these fanfictions, his married life often involves trying to be there for his family while also being away for long periods on cases.
One common theme is Reid's intellectual superiority. Fanfictions often highlight how his genius mind sets him apart from others. For example, in many stories, he's the one who cracks the most difficult parts of a case.
Romance is also a big theme. Whether it's a slow - burn or a more immediate attraction, the relationship between the female and Spencer Reid is often central. For example, they might start as colleagues and gradually develop feelings for each other over time as they solve cases together. It adds an emotional layer to the usually intense and cerebral world of Spencer Reid.
Recovery is also a big theme. The fanfics usually follow Reid's journey from being hurt to getting better. This can involve his own internal processes of dealing with the pain, as well as external factors like medical treatment and the care of his friends. It often shows his determination to get back to his normal self and continue his work in the BAU.
A common theme is Reid's unique perspective. His autistic mind gives him a different way of seeing things, which often leads to him making connections in cases that others miss. For example, in many fanfics, he notices small details in crime scenes that others overlook because of his hyper - attention to detail, which is a characteristic of autism.
One common theme is the exploration of Spencer's vulnerability. Despite his intelligence, the idea of becoming a father makes him feel out of his depth in many stories.
Another theme is acceptance. The stories often deal with how Reid's friends and colleagues accept or react to his new - found identity. It can range from full support to initial confusion and then coming around. There are also themes of love against all odds, as Reid might face challenges in a relationship with a male partner in a world that may not be entirely open - minded.