One popular Fate Stay fanfiction that Shirou might watch could be those that explore his different possible relationships in more depth. For example, some fanfictions focus on his relationship with Saber in alternate scenarios. Another type could be ones that expand on his journey to become a hero, showing his internal struggles and growth in ways the original might not have fully explored. There are also fanfictions that involve Shirou interacting with other characters from the Fate universe in new and interesting ways.
I'd recommend 'Rin and Shirou: Love in the Chaos'. It's a really good one. It shows how their love can endure even in the most difficult of situations. The writing style is engaging and it really makes you root for the two of them.
One great 'Fate Stay Rin x Shirou Fanfiction' is 'A New Dawn for Rin and Shirou'. It beautifully captures their relationship, showing how they support each other through various challenges. The author does an amazing job of staying true to their characters.
One possible fanfiction could be where Rin and Shirou's kiss is a moment of realization. Maybe they've been through a tough battle together and in the heat of the moment, their feelings overflow and they share a kiss. It's a way to show their deep connection and the growth of their relationship.
In many fanfictions, Shirou and Rin's kiss is a highly anticipated and emotional moment. It often symbolizes a deepening of their relationship. Some fanfictions might build up to this kiss through a series of adventures and self - discoveries. For example, they could be in the middle of a battle, and in a moment of respite, their feelings for each other overflow, leading to the kiss.
In these crossovers, the theme of growth is quite common. Shirou starts as his normal self but through his experiences in the new world, he grows as a character. For example, in a crossover with the 'Naruto' world, he may learn new combat techniques and also gain more understanding of different kinds of power. Another theme is the exploration of new power dynamics. How his power compares to the powers in the new world, like if he's in the 'Bleach' universe, how his abilities stack up against Soul Reapers. And the theme of moral dilemmas also exists. He may face situations where the moral code of the new world challenges his own.
There are also fanfictions that explore Sakura's darker side in relation to Shirou. Given her connection to the Grail and the secrets she holds, she could be a more complex and dangerous figure. However, Shirou's love for her might be the thing that tames or redeems her in these stories.
Another angle in fanfiction could be the exploration of their character growth through their relationship. Shirou, who starts off with a rather idealistic view of heroism, might learn more about the reality of sacrifice and love from Sakura. Sakura, on the other hand, could gain more confidence and a sense of self - worth through Shirou's unwavering support. This mutual growth can be a fascinating aspect to explore in fanfiction.
It could be Gilgamesh. Gilgamesh is extremely powerful and has a very different view of the world compared to Shirou. Their ideals would clash, with Gilgamesh seeing Shirou as a weakling with naive dreams of heroism, while Shirou would see Gilgamesh as a tyrant who needs to be stopped.
Love is a very common theme. Their relationship, which was complex in the original work, is often explored more deeply in fanfiction, showing different aspects of their love for each other.