The most interesting aspect is probably the new power - ups. Since he still has his tail, there could be new forms related to it. Maybe a combination of his normal Super Saiyan forms and his ape - like abilities. It's exciting to think about how this would look in battles.
I think the most interesting part is how it changes Goku's character. Without losing his tail, he may retain some of his more primal instincts. This could lead to him having a different personality, being a bit more wild and unpredictable. And this new side of Goku would surely bring some fresh and unexpected plot twists in the fanfiction.
One of the most fascinating things about this fanfiction is how it impacts the Saiyan lore. In the original story, the loss of the tail was a part of Saiyan evolution. But here, Goku not losing his tail means that the whole concept of Saiyan growth and development has to be re - evaluated. It could open up new backstories and explanations about the Saiyan race, their powers, and their place in the universe. This re - imagining of Saiyan lore could be really engaging for fans who are interested in the deeper aspects of the Dragon Ball universe.
If Goku never lost his tail, his powers and abilities might have developed differently. Maybe he would have retained some primal monkey-like traits that could have given him unique advantages or disadvantages in battles.
Well, if Goku didn't lose his memory, his relationships with his friends and family could have developed differently. Maybe he'd have fewer conflicts or approach problems with a clearer mind.
Well, in the original story, Goku's loss of his tail was a significant event. But in this fanfiction, with him never losing his tail, it might mean he has different powers or abilities. Maybe he can still transform into a giant ape at will, which could change the way he battles. For example, in a fight against a powerful enemy, instead of using his normal Super Saiyan forms, he could use his ape form to overpower the foe in a more brute - force way.
One interesting plot could be that Goku's tail gives him a new power. Since it's always been a unique part of him, perhaps it allows him to communicate with a certain race of creatures that are only attuned to the energy his tail emits. Another plot could be that he has to protect his tail from an enemy who wants to use it for some dark magic. The enemy believes that Goku's tail holds the key to unlocking a powerful spell, so Goku has to constantly be on guard while still going about his normal adventures.
One possible plot could be that Goku somehow gets transported to the Fairy Tail world. He could join forces with Natsu and the gang to fight against a common enemy like Acnologia. Goku's power levels would be off the charts compared to most in Fairy Tail, but he'd be intrigued by their magic. Maybe he'd learn some magic himself or teach them some of his ki techniques.
The most interesting aspect could be the combination of Naruto's ninja skills with the meister concept. Naruto's chakra control and combat abilities could be translated into the meister framework in really cool ways.
The power - up potential. If Naruto was a mazoku, he could have access to different and perhaps more powerful abilities compared to his normal ninja skills. This could lead to really epic battles and new ways of handling threats in the Naruto universe.
It could also be a symbol of a new power - up. In the Dragon Ball series, new physical changes often lead to increased power. So, getting his tail back might mean that Goku is about to reach a new level of strength. Maybe he'll be able to transform into a new form that is related to his Saiyan heritage and the presence of the tail. This could give him an edge in future battles against stronger opponents.
Well, one possible plot could be that Goku somehow ends up in the Fairy Tail world. He might initially be confused by the magic there, but then start to learn about it. He could team up with Natsu and the gang to fight against a powerful dark wizard. Goku's strength and his unique fighting skills like the Kamehameha could be a great asset to Fairy Tail in battles.
In a fanfiction scenario where Goku gets his tail back, it might be due to a genetic experiment gone right. Some scientist in the Dragon Ball world, either good or bad, might be working on Saiyan genetics. They accidentally (or on purpose) trigger the regrowth of Goku's tail. Once he has his tail back, it could change his relationship with other characters. His son Gohan might be really interested in his dad having a tail again. Also, Goku could use his tail in combat in new and unexpected ways, like using it to grapple opponents from a distance or as a distraction during a fight.