Well, if you like a bit of mystery in your fanfiction, look for ones where the reader has some sort of hidden power or past that Jack is intrigued by. For example, there's a fanfic where the reader is from a long - lost alien race and Jack is trying to figure out what that means for the universe and for their relationship. These types of stories add an extra layer of depth to the Captain Jack Harkness x Reader dynamic.
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.
One great 'Jack Harkness x Reader Fanfiction' is 'A Chance Encounter'. It beautifully captures the charm of Jack and his interactions with the reader character. The story has a great plot that keeps you engaged from start to finish.
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 great Jack Harkness OC fanfiction is 'The Adventures of Jack and His New Companion'. It has an interesting original character who teams up with Jack on various time - traveling escapades. The story is well - written and really captures the essence of the Doctor Who universe that Jack is from.
The popularity of 'Jack Harkness x Reader Fanfiction' is mainly due to Jack's character. He's flamboyant, charming, and has a mysterious past. Fans love to imagine themselves in a story with him.
I'm not really into mpreg fanfiction specifically, but you can try searching on Archive of Our Own (AO3). They have a vast collection of fanfics, and you can use the search filters to look for Jack Harkness stories with crossover elements. Just type in 'Jack Harkness' and then add'mpreg' and 'crossover' as additional keywords.
There's also 'In His Arms'. This fic is amazing as it delves deep into the emotional connection between Captain America and the reader. It shows how they support each other through tough times, and the descriptions of their interactions are very vivid.
There's a popular 'laughing jack x reader fanfiction' called 'Jack's Hidden Affection'. This story delves deep into the psyche of Laughing Jack. The reader character is not your typical damsel in distress. Instead, they are strong - willed and gradually uncovers the softer side of Laughing Jack. It's a long - form fanfiction that has many twists and turns, making it a really enjoyable read for fans of this pairing.
One popular 'Captain Jack Sparrow x OC fanfiction' is 'The Pirate's Heart'. It has an interesting plot where the OC, a strong - willed woman, meets Jack Sparrow during his search for a hidden treasure. Their interactions are full of humor and adventure.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfics in general, and there are many 'jack harkness x reader' ones. You can use the search function and filter by tags to find exactly what you're looking for.