I've read 'A New Start for Enemies'. Here, after a magical accident, Harry and Draco start seeing things from each other's perspectives. Their friendship develops in a very natural way as they begin to understand the pressures each of them has been under. It has some really heart - warming moments.
One great fanfiction is 'The Unexpected Bond'. In this story, Harry and Draco are forced to work together on a project, and they gradually discover they have more in common than they thought. It really explores their characters in depth and shows how their friendship could develop in a believable way.
One challenge is staying true to the original characters. Harry is known for his loyalty to his friends like Ron and Hermione, and Draco has his Slytherin pride. So, making their friendship believable while keeping these traits intact can be difficult. For example, Draco's initial prejudice against Muggle - borns needs to be addressed and reconciled in the story for the friendship to seem real.
I also recall a fanfic titled 'Lily and Draco: A Different Path'. This one takes a more adventurous turn. It's set in an alternate universe where Draco and Lily are forced to work together on a secret mission. As they face various challenges, they learn to understand and respect each other more. The author does a great job of portraying Draco's growth as he is exposed to Lily's Gryffindor qualities.
Well, 'Shadows in Harry's Soul' is a fanfic that's quite good in this regard. It starts with a slow build - up of Voldemort's influence over Harry. As the story progresses, we see Harry's attempts to break free from the possession. The fic also has some interesting sub - plots involving the other characters trying to figure out what's going on with Harry and how to save him.
A really interesting one is 'Friendship Beyond Houses'. Here, the Weasley twins and Harry's friendship bridges the gap between Gryffindor and other houses. They team up with some Ravenclaw students to solve a mystery in the school. The story is full of humor and great character interactions that really highlight their friendship.
One possibility could be a fanfic where they are forced to work together on a project at Hogwarts. Maybe they are paired for a Potions assignment by Snape. At first, they are both reluctant and snipe at each other. But as they face difficulties in the task, like finding a rare ingredient, they start to see each other in a new light. Draco realizes that Harry isn't just the 'Chosen One' out to steal his thunder, and Harry sees that Draco has his own insecurities. Eventually, they form an unlikely friendship that shocks their classmates.
I really liked 'Draco's Sixth Year Redemption'. In this fanfic, Draco starts to question his loyalty to the Death Eaters. His interactions with Harry become more frequent and meaningful. They find themselves in a situation where they have to rely on each other in a way they never expected. It's a story that gives a fresh perspective on their characters during that crucial sixth year.
One interesting fanfic could be 'The Black Family Reunion' where Harry being Sirius' brother changes the whole dynamic of the story. It delves into how Harry's presence as a Black family member affects his relationships with other characters like Dumbledore and Voldemort. The story might explore how the Black family secrets are different with Harry in this new role.
There's also 'Unexpected Alliances' which focuses on how they form an alliance first due to some political unrest in the wizarding world. As they work together, they find out they have more in common than they thought and a real friendship blossoms.
Well, I really like 'All Our Secrets Laid Bare'. In this fanfic, Draco's character development is amazing. It shows how he copes with the changing situations in the wizarding world. 'Away Childish Things' is also a great choice. It has a unique take on Draco's story, showing his growth from a spoiled brat to a more complex character. Then there's 'The Manuscript' which has an intriguing plot involving Draco and some long - lost magic secrets.