One common theme is self - discovery. Yuuri often discovers new aspects of himself through his relationships with different characters. For example, in many fanfics, his interactions with Victor help him understand his own capabilities better.
One reason could be some fans' desire to explore darker themes. They might want to see how the character would react in extreme situations. Another reason could be a misinterpretation of the character. Maybe they think Yuuri's insecurities can be taken to an extreme in the form of abuse. However, this is not a healthy or positive way of expanding on the character.
One popular 'yuri on ice yuuri x everyone fanfiction' is 'Yuuri's Multifaceted Bonds'. It explores Yuuri's relationships with different characters in really interesting ways. The author does a great job of showing Yuuri's growth through these interactions.
They are popular because fans like to explore the deeper, more complex sides of the relationship between Yuuri and Victor. Problems add drama and realism.
There might be a fanfic named 'The Road to Acceptance' which delves into Yuuri's problems regarding his own worthiness in the relationship with Victor. It's a really emotional read as it portrays Yuuri's insecurities and how he and Victor work through them.
Yes, there might be some 'Yuri on Ice' fanfiction with Yuuri being abused. However, this is not in line with the general tone of the original anime. The anime shows Yuuri as a determined skater with a lot of support from his family, friends, and coach. Fanfiction like this can make the readers feel uncomfortable as it takes the story in a very different and often negative direction. It's important to note that while fanfiction allows for creativity, it should also respect the core of the original work.
There might be some out there. You could start by looking on popular fanfiction websites like Archive of Our Own. Just search for 'yuuri and wolfram' and then filter through the results to find ones related to pregnancy themes.
Another theme is the pursuit of perfection. Ballet is all about precision and grace, and in 'ballet yuuri fanfic', Yuuri is usually on a journey to achieve that perfection in his performances. It also often includes themes of friendship and support, as the other characters play important roles in Yuuri's ballet life, encouraging him and helping him grow.
In 'female Yuuri Shibuya fanfiction', a frequent theme is the exploration of different relationships. This could include her relationships with family members, friends, or potential love interests. For instance, she may have a closer bond with a female friend that was not as emphasized in the original story. Also, the theme of breaking gender norms often comes up. Yuuri, as a female, might challenge the traditional roles and expectations within the story's setting, which can lead to interesting plot developments.
I'm not sure specifically as I haven't read it in detail. But generally, a light novel often contains elements like unique characters, a fictional world, and an interesting plot. It might involve themes of adventure, friendship, or self - discovery.