Well, there are quite a few Thor x Reader x Loki fanfictions that explore different themes. For instance, some focus on a love triangle situation where the reader has to choose between Thor's straightforward and noble love and Loki's more complex and mysterious affection. You can search for these fanfictions on platforms like Fanfiction.net as well. The key is to read the summaries carefully to find the ones that match your interests.
One common trope is the 'fish out of water' for the reader when they are suddenly in the world of Thor and Loki. Another is the 'forbidden love' aspect, especially if the reader is from Midgard and the relationship with either Thor or Loki goes against some Asgardian rules.
There's also 'Loki's True Place by Thor's Side'. In this fanfiction, the author explores the idea of Loki finding his true self through his connection with Thor. It has a lot of emotional moments as Loki struggles with his identity and Thor is there to support him, making for a very engaging read.
One great Thor x Hawkeye fanfiction is 'Bond of Brothers in Battle'. It really delves into their relationship during a big war. They start off as comrades who don't quite understand each other fully. But as the story progresses, they learn to rely on each other's skills. Thor's godly strength combined with Hawkeye's precision shooting makes for some exciting battle scenes.
One common theme is the discovery of each other's powers. Since both characters may have unique abilities, fanfictions often explore how they learn about and respect each other's powers.
Another theme is emotional healing. Carol has a lot of emotional baggage, and Daryl is often portrayed as someone who helps her heal, and vice versa. Their relationship becomes a source of comfort in a harsh world.
Another one is 'A Journey with Carol'. Here, the reader and Carol embark on an intergalactic adventure together. The author does a wonderful job of portraying their emotional connection throughout the journey.
The theme of redemption also appears often. Loki, in particular, is a character who often has a journey of redemption in these stories. The reader can play a part in his journey, either by believing in him or by helping him see the error of his ways. And Thor may also have to come to terms with Loki's changing nature as the relationship with the reader progresses.
Love and redemption are also common themes. The OC might be a character with a troubled past, and Thor helps them find redemption. At the same time, they fall in love. It's a classic trope that gives an emotional depth to the relationship between the two characters. This can be seen in many 'Thor x OC fanfiction' where the OC has to overcome some personal demons with Thor's support.
A common theme is the discovery of self. The OC often starts as an ordinary person but through their encounters with Thor, they find out more about their own strength and purpose. For example, in many fics, the OC might be a shy person at first but becomes brave when facing challenges with Thor.