Again, without the actual stories, it's hard to define. But if we assume, he could be a kind - hearted person. Maybe in the stories he is always helping others in need, like giving food to the homeless or helping an old lady cross the street.
Well, I'm not sure specifically which 'Jack Black Bouvier' you are referring to. There could be many people with this name. Maybe he is a local hero in a small town? Without more context, it's hard to tell specific stories.
One story could be about a beginner who managed to win big in an online Black Jack game. He just followed basic strategy and got really lucky with the cards dealt. It was his first time playing seriously online, and he walked away with a nice profit.
There's also a story about Jack Black's audition for certain roles. He has a very distinct look and style, which sometimes worked in his favor and other times made casting directors hesitant. But he persevered and continued to show his talent through various performances. For example, in 'King Kong', he added his own touch to the character he played, making it memorable despite the large - scale nature of the movie.
Well, some Black Jack fanfiction might revolve around his adventures in different parts of the world. He could be traveling to a remote area where a strange disease is spreading, and he has to use his wits and medical knowledge to stop it. There could also be a story that delves into his past traumas and how they shape his present actions as a doctor. For example, a childhood event that made him so determined to help those in need.