I really like 'The Levi Chronicles'. It's a series of fanfictions that follow Levi through different events in the Attack on Titan universe. The author has a great understanding of Levi's character, his stoicism, and his unwavering loyalty. 'Under Levi's Command' is also a popular one. It focuses on Levi's leadership skills and how he manages to lead his team through difficult situations, all while maintaining his cool and collected demeanor.
There's also 'Levi in Middle - earth'. This fanfiction takes Levi to the world of J.R.R. Tolkien. His discipline and fighting prowess are a great fit for the battles against orcs and other dark forces in Middle - earth. The story does a good job of showing how Levi might adapt to this very different yet equally dangerous world.
A unique Levi Ackerman love story could be where he falls in love with an enemy turned ally. Maybe she was once part of a group that opposed his, but through some events, she realizes the error of her ways. Levi, seeing her change, is intrigued. Their relationship is full of tension at first as they both have to overcome their past differences. Eventually, love blossoms as they work together towards a common good.
One way is to ask other Attack on Titan fans directly. You can go to fan conventions or events related to the series and strike up conversations about Levi Ackerman fanfictions. Also, check out fan - made blogs dedicated to Attack on Titan. They often review and recommend fanfictions. Some of these blogs have a specific focus on Levi Ackerman, so you're likely to find some great reads there. Moreover, don't forget to explore Tumblr. There are many Levi Ackerman fanfic enthusiasts there who post about their favorite stories.
Crossover fanfictions with Levi Ackerman often allow for unique plot twists. Imagine him in a world of superpowers, he would have to figure out how to deal with powers that are very different from his own. It gives the writer a lot of room to explore different relationships and storylines that we wouldn't see in the original Levi Ackerman stories.
One possible Levi Ackerman love story could be that he meets a fellow soldier. They start off as comrades, sharing the same goal of fighting Titans. As time passes, he notices her courage and selflessness. Slowly, he begins to develop feelings for her. He shows his love in small, subtle ways, like always making sure she's safe during battles and sharing his rare moments of peace with her.
Well, 'Ackerman's Heartbeat' stands out for me. It has wonderful character development and emotional depth in the love story of Levi. The plot is engaging and keeps you hooked throughout.