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 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.
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.
There's 'The Path to Redemption' where Hanzo is on a journey of self - discovery and McCree becomes an unexpected part of it. This fanfic shows their growing connection in a very heartwarming way. It has some really nice dialogue exchanges that bring out their chemistry.
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.
There's this fanfic called 'A New Alliance'. It's not just about the relationship between Hanzo and McCree but also about how they team up to face challenges in the Overwatch world. The way the author writes their interactions is quite engaging.
The plot is key. It could be something as simple as them getting to know each other better during a mission or a more complex story about their pasts affecting their relationship. Also, the chemistry between them has to be believable. If it feels forced, the fanfic won't be good.
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.
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.
Protection is also a major theme. McCree feels the need to protect Mercy from the dangers of the world they live in, while Mercy protects McCree in her own way, by healing his physical and sometimes emotional wounds.
Another theme is the contrast between their personalities. Genji is more of a reserved, yet spiritually - inclined character, while McCree is more of a rough - around - the - edges cowboy type. Fanfictions often play on this contrast, showing how they complement each other and learn from one another as their relationship progresses.