One common theme is love and relationships. Writers often explore how Jack forms deep, emotional connections with other male characters. Another theme could be identity, as Jack's own complex identity is further explored in relation to his sexual orientation in these fanfics.
One popular theme is his adventures in different time periods and how his relationships develop during those travels. For example, his encounters with other characters in a romantic context while on a mission in a particular era.
Well, it has its own following. Jack Harkness is a charismatic character, and his sexuality is part of what makes him interesting. Fanfic writers often take his character and create stories that explore his gay relationships, whether it's with other established characters or original ones. So, while it may not be mainstream across all fanfiction, it has a dedicated group of writers and readers.
Romance is a very common theme. Writers often explore the relationship between Jack and the reader character, from the initial attraction to a deeper emotional connection. Another theme is adventure, as Jack is known for his time - traveling and exciting exploits, and the reader usually gets involved in these adventures too. There's also the theme of mystery, given Jack's own mysterious past and nature.
Well, another place could be FanFiction.net. However, the collection on AO3 is usually more diverse and inclusive. You might need to dig a bit deeper in the search results on FanFiction.net to find exactly what you're looking for. Keep in mind that different authors may have different writing styles, so it's fun to explore different works.
One great 'jack harkness x reader fanfic' is 'A Journey with Jack' on FanFiction.net. It has a really engaging plot where the reader character gets involved in Jack's adventures across time and space. The writer does a wonderful job of capturing Jack's charm and charisma, making it a very immersive read.
One possible plotline could be that the Doctor and Jack Harkness team up to save a planet from an unknown alien threat. They use their combined knowledge and skills to outwit the aliens.
There are themes like friendship evolving into love. Jack might start off with a close friendship with another character, and as the story progresses, it turns into a romantic relationship. Another common theme is the struggle for equality. Just like in real - life situations, Jack may have to fight for his rights and the right to love in the Supernatural world. And of course, the theme of sacrifice can also be present, where Jack or his partner might have to sacrifice something for their relationship.
One interesting Jack Harkness pregnant fanfiction could be where his pregnancy is a result of some alien encounter. Maybe an alien race has a unique way of reproduction and Jack, being the adventurous character he is, gets caught up in it. This type of story can explore how he deals with the physical and emotional changes, as well as how his friends react to this unexpected situation.
There could be a lot of banter between them. Jack might make jokes about the Doctor's sometimes stuffy and proper behavior, while the Doctor would roll his eyes at Jack's more flirtatious and carefree attitude. But in serious situations, they would support each other. For instance, when facing a powerful enemy, the Doctor would use his strategic thinking and Jack would use his combat skills and charm to get out of difficult situations.
Friendship is another theme. Some fanfic might focus on Jack Harlow's friendships with other artists or people in his life. It could be about how his friends support him during his tours or how they collaborate on music together in a fictional scenario. This can give readers an inside look at the relationships that might be part of his world.