Well, fanfictions about Vax and Keyleth's first time can be really interesting. Some fanfictions focus on the emotional build - up between them. They might explore how their relationship grew over time and how that led to this special moment. For example, it could start from their initial adventures together, the small glances and touches that gradually developed into deeper feelings.
You can try Archive of Our Own (AO3). It has a vast collection of fanfictions for various fandoms, including Critical Role where Vax and Keyleth are from. Just use the search function and type in relevant keywords like 'Vax and Keyleth first time' and you'll likely find some works.
There's also 'Percy and His Harem of Allies'. In this fanfiction, it combines action and the development of Percy's relationships with his harem. The author does a great job of writing the characters' interactions and how Percy copes with having multiple close relationships. It's a really exciting read.
The theme of family also comes up. Percy has a complex family situation, and Hestia can be seen as a mother figure in some fanfictions. This relationship can explore what it means to have a stable and loving family member in the chaotic world of Percy Jackson. It can also show how Percy responds to this new kind of family connection, perhaps growing and maturing as a result of Hestia's influence.
Another theme is friendship within the harem. Often, the members of Percy's harem are his friends first, and the fanfictions explore how these friendships can transform into something more. They also show how the characters support each other through various challenges.
One great 'Percy x Nico x Jason' fanfiction is 'The Three Heroes' Journey'. It beautifully weaves their characters together, exploring their friendships and the challenges they face as a trio. The author does an amazing job of capturing their individual personalities. Percy's loyalty, Nico's mystery, and Jason's leadership all shine through in the story.
One key theme is friendship. In most fanfictions, they start as acquaintances or even rivals in some cases, but over time, they form a deep bond. For instance, in many stories, they learn to rely on each other's strengths. Percy's strength in water, Nico's connection to the underworld, and Jason's control over lightning are combined to overcome challenges.
In many Percy x Thalia x Artemis fanfictions, the theme of family also pops up. Even though Artemis is a goddess and Percy and Thalia are demigods, they can create a sort of found family dynamic. Power and its control is another theme. With their different powers and abilities, fanfics might explore how they use or struggle with their powers in relation to each other. And of course, there's the theme of loyalty. How far are they willing to go to protect and be loyal to each other?
Another theme could be the power dynamics. Percy has his own powers as a demigod, and Artemis and Aphrodite have their divine powers. How these powers interact and sometimes conflict can be an interesting aspect. For instance, Percy's ability to control water might play a role in a situation where Aphrodite is trying to create a romantic scenario and Artemis is trying to resist.
A really good 'Percy Jackson x Clarisse Fanfiction' is 'When Percy and Clarisse Train Together'. In this one, they are forced to train together and through the process, they discover new things about each other. They start to respect each other more and it's a great read for those who like character - development - focused stories.