I really like the fanfiction 'In Moody's Shoes'. It takes the reader on a journey through Moody's eyes. You get to experience his paranoia, his skills as a wizard, and his complex relationship with the Order of the Phoenix. It adds a lot of depth to his character and is a great exploration for any 'Harry Potter' fan interested in Mad - Eye Moody.
The mystery surrounding Mad - Eye Moody makes fanfiction appealing. In the original series, he had a lot of secrets. Fanfiction allows us to explore those secrets further. For example, we can imagine what he was really thinking when he was teaching at Hogwarts.
One great Hermione and Alastor Moody fanfiction is 'The Unlikely Alliance'. It explores a scenario where Hermione has to work closely with Moody on a dangerous mission. The story does a great job of building tension and showing their different personalities interact.
Mistrust and suspicion is also a frequent theme. Given Moody's nature of being always on guard and Draco's family background, there are often stories where they initially don't trust each other but gradually learn to see past their prejudices. This can create a lot of tension and drama in the fan fictions.
There's 'A Change of Perspective' where the author explores what would happen if Draco Malfoy had to be mentored by Mad - Eye Moody. It's a really cool take on their relationship and how they could influence each other's growth in the wizarding world.
Another common theme is adventure. Picture Hermione and Moody going on some secret mission to take down a new dark wizard threat. These stories usually involve a lot of action, like dueling and sneaking around in dangerous places.
Harry would likely be more gruff and less trusting. Growing up with Moody, who was always on guard, Harry would have learned to be more cynical. He might not be as quick to make friends as he was in the original story.
Perhaps Moody, being a very experienced Auror, trains Harry in some dark magic defense techniques that are not taught at Hogwarts. This gives Harry an edge in fighting the dark forces but also makes the Hogwarts faculty a bit wary of him. He could then be in a situation where he has to prove that his knowledge is for good and not for dark purposes.
Another good character to pair with Moody might be Sirius Black. Given their both having experience with the dark side of the wizarding world, they could team up in a fanfiction to take on some new threat or solve a long - standing mystery that has to do with the dark wizards.
One interesting Moody fanfiction could be where he mentors Harry in a more in - depth way outside of the classroom. It might explore Moody's past experiences with dark wizards and how he imparts that knowledge to Harry for future battles.