Another unique element is the exploration of new storylines. When Obi - Wan is put into a different setting, like a post - apocalyptic world in a crossover, new challenges and adventures emerge. He has to use his Jedi skills in unexpected ways, and this often leads to creative and engaging plotlines that we wouldn't see in the regular Star Wars canon.
There's also 'Obi - Wan and the Hogwarts Adventure'. This one is a crossover with the Harry Potter universe. In it, Obi - Wan finds himself at Hogwarts, and there are some really cool interactions between him and the wizarding world characters, like Dumbledore. The story plays with the idea of different magic systems colliding.
One interesting concept could be a crossover with the Star Trek universe. Imagine Obi - Wan using the Force in a world where technology and different species co - exist in a more scientific - based way. Another concept might be a crossover with the Lord of the Rings. Obi - Wan could bring his Jedi skills to Middle - earth and interact with the wizards and warriors there. Also, a crossover with the Harry Potter universe could be cool, with Obi - Wan teaching the young wizards about the Force which could be seen as a different form of magic.
In Obi - Wan Kenobi crossover fanfiction, Qui - Gon Jinn is a common character to be paired with him. They could be in a crossover where they have to face a new and powerful enemy that requires both their skills and knowledge. Darth Vader (Anakin after his fall) is also often paired. This creates a very interesting dynamic as Obi - Wan has to deal with his former apprentice in a different context, perhaps in a world full of steampunk technology. Leia Organa can be paired with Obi - Wan too, where she learns more about her connection to the Force and her father from Obi - Wan in a crossover with a space - faring civilization different from the Star Wars galaxy.
One possible plot could be that Obi - Wan somehow gets transported to the Marvel universe. He meets Doctor Strange, who senses his strong connection to the Force. Together, they team up to fight against a new dark force that is threatening both the Jedi way and the safety of the Marvel universe.
Count Dooku could be a prominent character. Given his own fall to the dark side, he might be a mentor or a rival to Obi - Wan in the fanfiction. Mace Windu is another one. His strict view of the Jedi Code and his relationship with Obi - Wan could be explored in the context of Obi - Wan's turn. And of course, there are the various Sith Lords and dark side adepts that might surround Obi - Wan, either as allies or enemies in his new dark side life.
Often, Obi - Wan uses his mastery of the Force. He might use a Force - push to overpower his guards when they least expect it and then make a run for it. He could also use a mind trick on a high - ranking captor to order his release.
The Obi - Wan and Satine kiss fanfiction usually adds more emotional depth to their relationship. It can be a way for fans to imagine what could have been if their relationship had developed more romantically. Some fanfictions might describe the kiss as a bittersweet moment, full of longing and the knowledge that their love is doomed in the context of the larger Star Wars universe.
One great Sith Obi - Wan fanfiction is 'The Fall of the Jedi Knight'. It explores an alternate universe where Obi - Wan succumbs to the dark side. The story delves deep into his internal struggle and how his relationships change. His interactions with Anakin, for example, take on a whole new and darker dimension.