The main theme could be addiction. Smoking often represents an addiction in literature, and the story might revolve around the character's struggle with this habit, how it affects their life, relationships, or personal growth.
I'm not sure specifically as I haven't read the actual story. But it could be the smoker themselves as the central character. They would be the focus of the story's events and development.
A common theme is the clash of different worlds. Since Smoker and Hunter likely come from different backgrounds, there's often a struggle to understand each other's values and ways of life. For example, in many fanfictions, Smoker's more law - abiding nature clashes with the Hunter's more free - spirited approach.
One common theme is rivalry. Given their different natures in the One Piece world, a lot of fanfictions play on their initial dislike for each other and how that might evolve. Another theme is redemption. Crocodile has his villainous past, and some stories might have Smoker be a part of his journey towards redemption.
Yes, there are many great 'hunter x smoker fanfic' out there. You can start by looking on popular fanfiction websites like Archive of Our Own. Just search for 'hunter x smoker' and you'll find a variety of stories with different themes and styles.
Good plot is key. It could be a story that takes them on an adventure outside the main storyline of 'Hunter x Hunter', or a story that dives deeper into their pasts and how it affects their relationship. Also, the writing style matters. A vivid and engaging writing style can make the fanfic really stand out. For instance, if the author can make you feel the tension between Hunter and Smoker in a fight scene or the warmth in a friendly moment, it's a great fanfic.
One common theme is friendship. Since they are both interesting characters, fanfictions often explore how they could become friends despite their differences. Another theme is adventure. They are likely to be put in various exciting situations in these stories.
It could involve health problems like breathing difficulties and a higher risk of serious diseases. Also, there might be social pressure and the struggle to quit.