Well, in falling in love fanfic, the 'forbidden love' trope is really popular. This could be like a vampire and a human in some supernatural fanfics. Also, the 'long - distance love' where the characters have to overcome distance to be together. And then there's the 'unrequited love' that turns into mutual love, which adds a lot of drama.
There are several great tropes in falling in love fanfic. The 'soulmate' trope is often seen, where two characters are meant to be together by some sort of destiny. The 'second chance at love' is also quite prevalent, especially when characters have a past relationship that ended badly but then get another chance. And the 'fish out of water' love story, for example, when a character from a different world or culture falls in love in a new environment.
The 'enemies to lovers' trope is also common. Maybe Thranduil starts off disliking a character, perhaps a dwarf or a human, but over time, they develop feelings for each other. It creates a lot of tension and drama in the story. And it's interesting to see how their relationship evolves from hostility to love.
One popular trope is the 'slow burn'. This is where the two best friends gradually realize their feelings over a long period. Maybe they start with small, innocent touches like brushing hands, and then as time goes on, the tension builds until they finally confess. Another is the 'forced proximity' trope. For example, they might have to share a small apartment for some reason, which makes them see each other in a new light and their feelings start to shift. And the 'big misunderstanding' trope is also common. They might misinterpret each other's actions or words, leading to some angst before they finally get together.
One popular trope is the 'accidental meeting'. For example, the reader might accidentally bump into Nightwing during one of his patrols in the city. Another is the 'protective Nightwing' trope, where he saves the reader from danger and then a romantic connection begins to form.
One popular trope is 'enemies to lovers'. In many fanfics, two characters who initially dislike each other gradually fall in love. Another is 'the chosen one' trope, where a character is singled out for a special mission or power. 'Soulmate' trope is also common, where characters are fated to be together in some way.
One common trope is the 'Suddenly Aware' moment. For example, in many fanfictions, there's a scene where one best friend sees the other in a new light, like at a party when the friend is all dressed up and looking amazing. Another is the 'Near - Miss Confession', where they almost admit their feelings but get interrupted. And the 'In - Sickness - and - in - Health' trope, where taking care of a sick best friend makes their love grow deeper.
One popular trope is the 'alternate universe' where the Avengers' story unfolds in a completely different setting or with different character dynamics. Another is the 'character redemption' arc, like when a villain - like character tries to become good. And of course, there's the 'team - up against an overpowering foe' trope which is classic in Avengers fanfics.
One popular trope is 'enemies to lovers'. In Sterek fanfic, Derek and Stiles start off not getting along but gradually fall in love. Another is 'soulmates'. Fans like to write about them being fated to be together. 'Hurt/comfort' is also common, where one of them gets hurt and the other takes care of them.
Well, the 'celebrity crossover' is quite popular. It could be a story where actors from different movies or shows interact in a completely new scenario. For instance, characters from a superhero movie meeting characters from a horror movie in a fanfic. Also, the 'backstage drama' trope is often used. This involves creating stories about the behind - the - scenes chaos, relationships, and rivalries in Hollywood. And then there's the 'time - travel' trope where a character goes back in time to change something related to their Hollywood career or a movie's production.
One popular trope is 'Soulmate AU'. In these stories, Dean and Castiel are fated to be together as soulmates. Another is 'Hurt/Comfort', where one of them is injured or in distress and the other provides comfort. 'Alternate Universe' is also common, like a high school AU where they meet in a completely different setting than the show.
Some popular tropes include the 'power - up' trope. This is when a character gains new powers or abilities and has to learn to control them. Also, the 'unlikely alliance' trope is quite common. It involves characters who would never team up in the original story coming together for a common goal. And of course, the 'love triangle' trope, which adds a lot of drama as one character is caught between two potential love interests.