I'm not really into that particular slash fanfiction myself, but you can try searching on fanfiction.net or Archive of Our Own (AO3). They have a vast collection of Harry Potter - related fanfictions, and you might be able to find some Severus Snape and Ron Weasley ones there.
One common theme could be the exploration of an unlikely relationship. Since Snape and Ron have very different personalities in the original story, fanfiction might focus on how they overcome their differences. Another theme could be the power dynamic, as Snape is a teacher and Ron is a student, which can add an interesting layer to the relationship in the fanfic.
Another great one is 'Ron and Snape: An Unlikely Pairing'. This fanfiction focuses on how Ron's carefree nature starts to chip away at Snape's cold exterior. It has some really well - written character development and some great dialogue between the two characters.
One great Severus Snape and Ron Weasley fanfiction is 'The Unlikely Bond'. In this story, Snape and Ron are forced to work together on a dangerous mission in the Forbidden Forest. It shows how their initial animosity slowly turns into respect as they face various magical creatures and dark magic threats. Another interesting one is 'Snape's Surprising Ally'. Here, Ron discovers a side of Snape that no one else has seen when he stumbles upon Snape's secret research. This leads to a series of events where they have to rely on each other.
One common theme is redemption. Snape is often portrayed as a character in need of redemption in these fics, and Ron can be the catalyst for that change. For example, Ron might see past Snape's harsh exterior and actions in the original series and help him become a better person.
One popular 'Harry Potter and Severus Snape slash fanfiction' is 'The Prince's Tale Reimagined'. It delves deeper into the relationship between Harry and Snape in a way that's quite different from the original series. It shows a more complex emotional bond between them.
Often, in fanfictions, Ron's loyalty to his friends and Snape's knowledge of the Dark Arts create an interesting dynamic. Snape may be reluctantly impressed by Ron's courage, which is something he secretly admires in Gryffindors. And Ron might come to realize that Snape is more than just the mean professor he thought he was. There are also fanfictions where they are paired up for a difficult class project, and through that, they start to understand each other better.
One popular 'Harry Potter and Ron Weasley slash fanfiction' is 'The Bond Between Us'. It delves deep into their relationship in a creative way, exploring how their friendship could potentially evolve into something more. The story has great character development and really makes you think about the dynamic between them.
I really like 'A Different Kind of Rivalry'. It shows a unique take on the relationship between Snape and Sirius. Instead of just focusing on their enmity from the original series, it creates a scenario where they have to work together and gradually start to understand and care for each other. It's a refreshing read.
In Draco Malfoy and Ron Weasley slash fanfiction, writers usually play with their personalities. Draco's haughty and somewhat complex character combined with Ron's more straightforward and loyal nature creates an interesting contrast. This contrast is what makes the relationship in the fanfiction so appealing to some readers as they get to see how these two very different characters interact in unexpected ways.
The appeal lies in the novelty of pairing two characters who were initially enemies. It's exciting to see how their relationship could transform from hostility to something more positive, like friendship or even love.