One common theme is the idea of overcoming their rivalry. In many fanfics, they start off as enemies but gradually learn to respect and even care for each other. Another theme is self - discovery. Through their relationship, they often discover new things about themselves. For example, Kyo might learn to control his temper better and Yuki might become more open about his emotions.
One great Kyo Sohma x Yuki Sohma fanfiction is 'The Unlikely Bond'. It explores their relationship in a new light, showing how they gradually come to understand each other better outside of their usual rivalry. Another is 'A New Beginning' which delves into a scenario where they have to work together to solve a mystery in their family. And 'Shared Secrets' is also interesting as it focuses on them sharing personal secrets and growing closer because of it.
Definitely. The Fruits Basket manga is complete. It provided a satisfying conclusion to all the arcs and left fans with a fulfilling reading experience.