One common theme is redemption. McCree and Hanzo both have complex pasts, and many fanfictions explore how they find redemption through their relationship. Another theme is trust. Since they come from different backgrounds in the Overwatch world, building trust is a big part of their stories.
In 'Overwatch McCree x Hanzo fanfiction', the theme of acceptance is prevalent. They both have to accept each other's flaws and past actions. Hanzo has to accept McCree's more carefree ways, and McCree has to understand Hanzo's strict sense of honor. Another common theme is growth. Their relationship helps them grow as individuals, both in terms of their combat skills and their emotional intelligence.
One common theme is redemption. Hanzo often has a past he's trying to atone for, and mccree can be a part of that journey. For example, in many fanfics, mccree helps Hanzo see that he can move forward from his past mistakes.
A common theme is the clash and then the melding of their different cultures. McCree represents the wild west sort of cowboy culture, while Hanzo has his traditional Japanese heritage. Their fanfics often explore how these two different worlds come together.
One common theme is loyalty. Given their different allegiances in the Overwatch universe, many fanfictions explore how they deal with their loyalty to their own causes while being in a relationship. For example, Ashe has her gang and McCree has his own code of honor.
One common theme is redemption. Hanzo, who has a lot of guilt for what he did to Genji in the past, often goes through a journey of redemption in these fanfictions. Another theme is family reconciliation, as they are brothers.
One popular 'Overwatch McCree x Hanzo fanfiction' is 'The Road to Redemption'. It beautifully explores their relationship as they overcome past differences and fight together. Another great one is 'A New Bond' which focuses on how they gradually develop feelings for each other during a mission.
One common theme is family and reconciliation. Since they are brothers, many fanfics focus on how they can overcome their past and reunite. Another theme is redemption. Hanzo, in particular, is often depicted on a path to redeem himself for what he did to Genji. Also, honor and the Shimada clan's legacy play a role as they both are part of this important clan.
One common theme is role - reversal. Since Hanzo is originally male in the game, in fanfiction with a female Hanzo, she might take on different roles within the Overwatch team or story. For example, she could be a more nurturing or diplomatic figure compared to the male Hanzo's often stoic and lone - wolf nature.
One great mccree x hanzo fanfiction could be 'The Meeting on the Bridge'. It beautifully depicts their first encounter and the initial sparks of an unexpected friendship. The story focuses on how their different personalities, McCree's laid - back cowboy nature and Hanzo's more reserved samurai - like demeanor, start to complement each other.
In the Overwatch lore, one interesting aspect is their different backgrounds. McCree is a cowboy - like figure from the American Southwest, while Hanzo is from a traditional Japanese family. Their clashing cultures can lead to interesting interactions and character development.
You can start by looking on Archive of Our Own (AO3). It has a vast collection of fanfiction for all kinds of pairings, including mccree x hanzo. The site has a great search function that allows you to filter by tags, ratings, and word count.