The writing style also matters a great deal. If the author has a way with words that can bring out the emotions of the characters vividly. For instance, when the reader is supposed to be in love with Loki, the writer should be able to make the readers feel that love through the descriptions of the character's thoughts and actions. Also, the dialogue should be well - written, sounding like something Loki would actually say. A fanfic that combines all these elements will surely stand out in the sea of 'Loki x Reader Fanfic'.
A great 'Loki x Reader Fanfic' stands out when it nails Loki's character. Since Loki is such a complex character from the Marvel universe, getting his essence right is crucial. If the fanfic can show his mischievous side as well as his more vulnerable side, it becomes really interesting. For example, when he interacts with the reader, his sarcastic remarks but also his moments of sincere connection can make the story shine.
The relationship development between Loki and the reader is also key. It should be believable and not rushed. A good fanfic will gradually build the connection. Maybe they start as enemies or strangers and through a series of events, they start to care for each other. This journey of their relationship is what makes readers keep reading. Also, the setting and plot should be engaging. If it's set in an interesting part of the Marvel universe or has a unique plot like a time - traveling adventure involving Loki and the reader, it will be more appealing.