One common theme is power exploration. Writers often explore how the stands from Golden Wind interact with powers from other universes. Another theme is friendship. They show how characters from different backgrounds form new bonds.
There's 'Golden Wind Meets the Old Gang'. In this fanfiction, the characters from Golden Wind interact with the previous generation of JoJo characters. It's full of action and nostalgic references. For example, the way they use their stands in different situations is really exciting to read about.
I'm not entirely sure specifically as it could be a rather niche or new light novel. It might be about a 'golden experience' which could involve a character's journey of self - discovery, growth, and perhaps encountering various challenges and adventures along the way.
As I haven't read 'the golden experience point light novel', I can't determine the main characters. It could be a young hero or heroine on a quest, or perhaps a group of adventurers. But without reading it, it's all speculation.
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.
It makes the reading experience more engaging. When the author follows the golden rule, like providing all necessary clues, readers can feel like they are part of the investigation.