Some popular ones could be 'Sword of the Rohan' which is known for its epic battles and complex characters. Another might be 'Rohan's Quest', a story full of mystery and adventure.
There could be multiple factors. His role models, whether they were his teachers, older siblings, or people he read about in books, might have inspired him. Also, the realization that hard work brings rewards, like good grades, praise from others, and a sense of accomplishment, would have made him keep up his hardworking attitude.
Popular 'rohan x josuke fanfic' often focus on their unique dynamic. They might play up Rohan's eccentricity and Josuke's more straightforward nature. Also, a lot of them involve some sort of mystery or adventure that the two characters embark on together.
It could be about a conspiracy within the Rohan setting. Maybe it involves political intrigue among the Rohan characters, like a plot to overthrow the king or some secret alliance that goes against the common good in the Rohan realm.
Rohan was a boy who always put in great effort in everything he did. He woke up early every morning to study before school. He was dedicated to his schoolwork, always completing his assignments on time and with high quality. He also helped his parents around the house, doing chores without being asked. His hard work paid off as he got excellent grades and was respected by his teachers and peers.
There's no way to really tell if it's common specifically for someone named Jojo. However, in general, reading fanfiction is a popular activity among fans of many different franchises. The Jojo series has a large and dedicated fan base, so it's likely that there are fans named Jojo who partake in reading fanfiction, but we can't say for sure how common it is without more data.
Perhaps this Jojo is interested in exploring different interpretations and stories within the Jojo universe that fans have come up with. Fanfiction often takes the existing characters, settings, etc. from the original Jojo series and creates new and unique storylines. So, this Jojo might be a big fan of the series and wants to see what other fans have imagined.