A common theme is the struggle between good and evil. The male ocs in these fanfictions are often faced with making choices that will determine which side they are on. Sometimes they have to resist the temptations of dark magic or the allure of power offered by evil characters. Another theme is the discovery of new cultures and places in Middle - earth. These male ocs get to explore different regions, meet different races, and learn about the rich history and traditions of Middle - earth, which is very much like Bilbo's journey in The Hobbit.
Power is a common theme. The male dragon OC often has great power, and the story may explore how he uses or misuses it. Another theme is isolation. Dragons are usually solitary creatures in Middle - earth, so the fic might deal with the dragon's feelings of loneliness. For example, in some fics, the dragon OC tries to find a place where he belongs among the other races.
One common theme is self - discovery. The original characters often start off not fully knowing their place or potential, but through their adventures in Middle - earth, they learn a great deal about themselves. For example, in many stories, a hobbit oc might think they are just an ordinary hobbit until they face a great danger or task and find they have hidden strengths.
A third common theme is the struggle against evil. Just as in the original story, in the fanfictions, Kili and the OC often find themselves up against various forms of evil, like orcs or dark wizards. This adds an element of danger and excitement to the story, and also shows how they rely on each other's skills and strengths to overcome these challenges.
One common theme is the elf - oc's struggle for acceptance. Since they are original characters, they often have to prove themselves in the established world of 'The Hobbit'.
One common theme is self - discovery. The female oc often finds herself in a new and strange world of the hobbits and through her interactions, she learns more about herself. For example, she might discover her courage or her ability to adapt. Another theme is friendship. The oc forms deep bonds with the hobbits, which is really sweet as they have such different backgrounds.
One common theme is adventure. Since it involves the Hobbit world, there are often quests and journeys. Another theme is friendship, like the relationship between Tauriel and the OC. For example, they might team up to face challenges.
One common theme is the clash of different cultures. For example, when characters from a modern - day or a different fictional universe enter Middle - earth in 'The Hobbit' crossovers, there's a contrast between their values and those of the hobbits, dwarves, etc. Another theme is the exploration of new powers. If a character with superpowers from another universe comes to Middle - earth, how those powers interact with the magic and skills in 'The Hobbit' world is often explored.
One common theme is the combination of magic and adventure. Just like in the original 'The Hobbit', there are quests and challenges, but the addition of fairies brings in a new level of magic. For instance, the fairies might use their magic to aid the characters in their travels or battles.
Identity is also a big theme. When a hobbit becomes a vampire or vice versa, or when they interact closely, they question their own identities. For example, a hobbit vampire may struggle with its newfound bloodlust while still having the hobbit's love for home and comfort. This internal conflict makes for an interesting read. It's often explored in great detail in these fanfictions.
One common theme is friendship. Female hobbits often form strong bonds with other characters in the fanfiction. Another theme is adventure. They go on quests and face challenges just like the male hobbits in the original stories. And of course, there's the theme of home. The female hobbits usually have a deep connection to the Shire and their hobbit - holes.