One great John x Karkat fanfic is 'A Strange Bond'. It beautifully explores their relationship as they navigate the challenges in their world. The author does an amazing job of portraying their personalities and how they grow closer over time.
One great 'Homestuck Gamzee x Karkat' fanfic is 'The Bond Between Them'. It really delves into their complex relationship, showing how their different personalities interact. The author does a wonderful job of portraying Gamzee's laid - back yet somewhat unpredictable nature and Karkat's more uptight and easily - flustered self. It's full of heart - warming moments as well as some comical exchanges that are true to the Homestuck spirit.
One common theme is friendship development. They often start off not getting along or having misunderstandings, and then gradually form a deep bond. For example, in many fanfics, Karkat's brashness and Gamzee's more laid - back nature initially clash, but over time they learn to appreciate each other's qualities.
The 'karkat x kanaya complimentary colors fanfic' might explore the relationship between Karkat and Kanaya in the context of their being like complimentary colors. It could delve into how their personalities, which might be as different as complimentary colors, interact. For example, if one is more brash and the other more calm, their exchanges could be full of tension and growth. It might also use the concept of complimentary colors in a more symbolic way, like their roles in a story being intertwined like how complimentary colors enhance each other in a visual sense.
One common theme is the idea of opposites attract. John and Karkat have very different personalities, and fanfics often play on how these differences can actually bring them together in a unique way.
There's also 'Karkat and Gamzee's Adventure'. In this fanfic, they embark on a journey together through a strange and magical land. It's full of interesting plot twists and the way their relationship develops during the adventure is really engaging. It has some really funny moments as well as some touching ones.
The plot could involve Karkat and Kanaya initially being at odds due to their different personalities (like how different complimentary colors can seem jarring at first). But then, they are forced to work together on a project or face a common enemy. As they do, they start to see the value in each other's differences. Their relationship grows, and they realize that they are better together, much like how complimentary colors enhance each other in art or design.
One plot idea could be them going on an adventure together in an alternate universe within the Homestuck world. They could face new challenges and enemies while also developing their relationship.
Another option could be Tumblr. There are many Homestuck fans on Tumblr who might share or recommend 'karkat x john' fanfics. You can search for relevant tags or follow Homestuck - related blogs to see if they have any suggestions.
You can try Archive of Our Own (AO3). It has a large collection of fanfiction from various fandoms, and there are bound to be some great Meenah x Karkat stories there. Just use the search function and type in their names.