You can start by checking out websites like FanFiction.net and Archive of Our Own. They have a large collection of Percy Jackson fanfictions. Just search for 'Percy Jackson' on their search bars, and you'll be presented with numerous stories to choose from.
One popular theme is 'alternate universes'. Writers like to explore what would happen if certain events in the original story were different. For example, what if Percy never went to Camp Half - Blood? Another theme is 'romance', especially the relationships between the main characters like Percy and Annabeth.
In Percy Jackson fanfiction, a relationship between Percy and Hestia could be really interesting. Hestia is the goddess of the hearth, representing home and warmth. A love story might involve Percy finding a new kind of peace and comfort in Hestia's presence. Maybe after all his adventures, he discovers a different kind of love with her, one that's more about stability and a sense of belonging.
Piper could also be a potential love interest in this scenario. Given her charm - speaking abilities, she could either be a rival to Percy in the 'player' game or be someone he tries to charm. Their interactions would be filled with a mix of friendly banter and underlying romantic tension.
In Percy Jackson fanfiction, the idea of Percy having a relationship with Demeter is quite an interesting concept. Demeter is the goddess of the harvest. A possible scenario could be that their love is based on Percy's respect for nature which Demeter represents. Maybe Percy helps Demeter in a quest related to protecting the harvest and in the process, they develop feelings for each other.
One great 'Percy Jackson' love fanfiction is 'The Sea's Embrace'. It beautifully weaves a love story between Percy and Annabeth in a post - war scenario. The author does an amazing job of showing their relationship evolving deeper.
In the Percy Jackson series, Gaea is a villain, and a love relationship between Percy and her in the context of the original story is very unlikely. However, in the world of fanfiction, anything can be created. There might be some fanfictions exploring such a strange and dark concept, but it would be a very unorthodox take on the characters.
In a 'Percy Jackson and a OC love fanfiction', you could also use the element of sacrifice. Let's say the OC is in danger of being captured by a powerful enemy. Percy risks everything to save her. This act of selflessness makes the OC see Percy in a new light. On the other hand, the OC could also sacrifice something for Percy, like giving up a chance to go back to her old life in order to stay with him at Camp Half - Blood. These sacrifices deepen their connection and lead to a stronger, more loving relationship.
One common theme is the struggle between love and the hero's destiny. In the Percy Jackson world, the characters have big responsibilities, and the fanfictions often explore how love fits into that. Another theme is the idea of forbidden love, like between a demigod and a mortal or two characters from different camps.
For finding 'Percy Jackson I Love You' fanfictions, you could also try Goodreads. Although it's mainly known for book reviews, there are groups dedicated to fanfiction. These groups might have members who are into Percy Jackson fanfic and can point you in the right direction. Additionally, following Percy Jackson fanfic writers on social media platforms like Twitter can lead you to their works, as they often promote their new stories there.