I would highly recommend 'Reid's Redemption'. This fanfiction shows a different side of Reid as he tries to overcome some personal issues while also developing a relationship with the reader. The way the author writes Reid's character is very true to the original show. Another good pick is 'In His Arms'. It has a very sweet and tender portrayal of the relationship between the two, with some really touching moments that will make you fall in love with the story.
There are quite a few amazing Spencer Reid x Reader fanfictions. 'A Chance Encounter' is a really nice one. It starts with a simple encounter between Reid and the reader and then develops into a deep and meaningful relationship. The author does a great job of capturing Reid's personality. 'Love in the Shadows' is also worth reading. It has a bit of mystery in it as the relationship between the two unfolds while they are dealing with a case together.
I really like the fanfiction 'Meeting Spencer Reid on the Train'. In this story, the author does an excellent job of creating a believable scenario for their meeting. The characters' reactions are very natural. 'First Meeting with Spencer Reid' is also a great read. It focuses on the little details, like Reid's nervous tics when he first meets the protagonist. And don't forget about 'Meeting in the Rain'. The setting of a rainy day gives a very romantic and moody feel to their first encounter.
One great Spencer Reid married fanfiction is 'A New Chapter'. It beautifully explores his life after getting married, with a focus on how he balances his family and his work at the BAU. The author does a wonderful job of portraying Reid's character and his growth in this new phase of life.
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.
I really like 'The Protector'. In this fanfiction, the author does an amazing job of portraying Eliot Spencer's character. The relationship between Eliot and the reader develops in a very natural way, with the story taking place in some exciting and dangerous scenarios. It has a good balance of action, drama, and romance.
Another good one is 'Shared Secrets'. This fanfiction focuses on the idea of the reader and Spencer sharing secrets that no one else knows. It delves deep into their emotional connection and how they support each other through difficult times. The way the writer portrays their relationship growth is very believable.
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 popular trope is the 'genius and the normal'. Since Spencer Reid is a brilliant genius, it's common to see stories where the reader is an 'ordinary' person who is drawn to his intelligence. Another is the 'hurt/comfort' trope. Reid has been through a lot in the show, so fanfictions often have the reader comforting him. For example, after a tough case.
One great Spencer Reid reader fanfiction is 'A Meeting of Minds'. It beautifully captures the essence of Reid's character and the relationship with the reader. It has a really engaging plot that keeps you hooked from start to finish.
One great fanfiction in this genre is 'A New Beginning'. It beautifully depicts the journey of the OC as she discovers she's pregnant and how Spencer Reid reacts to it. It has some really heart - warming moments and great character development.