One common theme is friendship development. Since Hinata and Kenma are from different teams, their relationship evolving from acquaintances to friends (or more) is often explored. Another theme could be how they support each other's growth in volleyball.
Sure. You can try searching on Archive of Our Own (AO3). There are a lot of great 'haikyuu hinata x kenma fanfic' there. Just type in the relevant tags and you'll find many interesting stories written by fans.
One great 'kenma x reader fanfic' is 'Kenma's Quiet Love'. It beautifully captures Kenma's introverted nature and how he gradually opens up to the reader. The author does an amazing job of creating a sweet and believable relationship.
One great 'kenma x reader fanfiction' to start with could be 'The Quiet Moments with Kenma'. It really captures Kenma's introverted nature well and how the reader can gradually break through his shyness. It has a really sweet and slow - burn kind of relationship development that many fans enjoy.
The theme of shared interests also pops up a lot. Since Kenma loves video games, many fanfics show the reader and Kenma bonding over games, whether it's playing together or just discussing their favorite titles. This shared interest helps to strengthen their relationship.
Volleyball - related themes are also common. Since they are both volleyball players, fanfics often center around how they train together, compete against each other, or how they strategize as a team. This could include a fanfic where they practice a new play and their relationship deepens through the shared experience.
One common theme is friendship evolving into something more. Since they are both from the Haikyuu!! universe, they start as teammates or rivals and then their relationship deepens in a romantic way.
One common theme is the 'opposites attract' scenario. Kuroo is often portrayed as confident and a bit of a tease, while Yachi is more shy and reserved. Their interactions based on these personality differences are fun to read.