Alternate universes are a big theme as well. Writers might create a universe where the events of 'glee' and 'torchwood' happen differently, like if the 'glee' club was in a world full of the alien threats that 'torchwood' faces, or if 'torchwood' was set in the high - school environment of 'glee'. This gives a lot of creative freedom to the writers.
Romantic relationships between characters from the two shows are also common. Maybe a character from 'glee' falling in love with a character from 'torchwood'. It allows for a lot of character development and exploration of different personalities coming together.
Fanfiction.net is also a great place to start. There are many authors who write 'glee' and 'torchwood' fanfictions there. However, the quality can vary, so you might need to read the reviews or summaries first to find the ones that interest you. Also, make sure to follow the site's rules and guidelines.
Character crossovers are also very common. Fans love to see how characters like Percy, Annabeth from Percy Jackson series would interact with Jack Harkness and the other members of Torchwood. These interactions can range from friendly alliances to tense rivalries. For instance, in some fanfictions, there is a competition between the demigods and Torchwood to solve a mystery first.
One popular theme is mentorship. Will as a teacher and Rachel as his ambitious student can lead to stories about him guiding her in her musical and personal growth. Another theme is friendship. They could form a unique bond that defies the typical student - teacher relationship. And there's also the theme of collaboration, like working together on a school musical where they learn from each other and overcome various obstacles.
In charmed and glee fanfiction, a popular theme is the crossover itself. Writers like to imagine how the two very different worlds of 'Charmed' and 'Glee' would interact. For example, how would the magic from 'Charmed' affect the glee club's performances? Another theme is the struggle for acceptance. In 'Glee', it's about acceptance in terms of being different in a high school setting, and in 'Charmed', it can be about being accepted as a witch in a normal world. Fanfiction often delves into this further, showing characters from both shows facing and overcoming acceptance issues in new ways.
One popular theme is their relationship development. Fans love to read about how they first fall in love, how they deal with misunderstandings, and how they grow closer over time.
A third popular theme is the fish - out - of - water concept. When Glee characters are thrust into the world of another show, like if they cross over with a show set in a different time period or a different type of setting. They have to adapt and it creates a lot of humorous and also heartwarming situations as they figure out how to fit in while still being true to themselves.
Romance is also a big theme. It could be between a bully and their victim, which creates a complex and interesting dynamic. Or it might be a love triangle involving the bully, the victim, and another character from Glee.
Another popular one is 'Slow Decay'. It explores the darker side of Torchwood and the moral dilemmas the team often faces. The complex characters and the engaging storyline make it a favorite among many Torchwood fans.
One common theme is survival. Given Owen's often - precarious situations in the show, many fanfictions explore how he manages to survive against all odds. For example, in some stories, he has to deal with life - threatening alien encounters alone.
One common theme is the clash of different kinds of supernatural or otherworldly elements. Since 'Supernatural' has a lot of demons, angels, and ghosts, and 'Torchwood' deals with aliens and time - space anomalies, when they cross over, there's often a struggle to understand and combat these different threats. For example, in many fanfics, the characters have to figure out how to fight an alien - possessed demon or something similar.