His friends might respect his decision more. They know how powerful the Kyuubi's chakra is, but also understand Naruto's reasons for not wanting to use it. This could strengthen their bond as they see Naruto's integrity.
One possible reason could be that Naruto fears losing control. The Kyuubi's chakra is extremely powerful and has a mind of its own. Naruto might be worried that if he uses it, he'll go on a rampage and hurt his friends or innocent people.
One consequence could be that he becomes extremely powerful. His physical abilities like strength, speed, and endurance are enhanced. He can also use more powerful jutsus with the extra chakra boost from the Kyuubi.
Well, in many fanfictions, Naruto often starts by facing a life - threatening situation. This intense moment somehow triggers a connection with the Kyuubi within him. Maybe it's during a battle against a really powerful enemy that he has no other choice but to tap into that power. It could also be due to some kind of emotional turmoil, like seeing his friends in great danger.
Well, in certain fanfic concepts, Naruto could control Kyuubi chakra with the help of unique jutsu or seals. For example, he might discover a new sealing technique that allows him to better manage the flow of the Kyuubi's power. This new seal could work in harmony with his own chakra system, enabling him to draw on the Kyuubi's strength without being overwhelmed. Also, some fanfictions might suggest that his strong emotional bonds, like his friendship with his comrades, give him the extra mental fortitude to control such a powerful chakra source.
In some fanfictions, controlling the Kyuubi chakra might change Naruto's appearance. He could have some physical features related to the Kyuubi, like red - tinted eyes or a more ferocious look when using the chakra. Also, his relationships with others might be affected. Some might be in awe of his new power, while others could be afraid of him.
In fanfiction, the Kyuubi's Yin chakra in Naruto is often portrayed as a source of great power and mystery. Some fanfictions might show Naruto having to master this part of the chakra to gain new abilities, like enhanced control over illusions or a deeper connection to the spiritual side of his ninja powers.
In fanfiction, the 'Naruto Kyuubi Chakra' often plays a central role in power - ups. It can make Naruto much stronger than in the original story, allowing him to defeat powerful enemies more easily.
One role is to enhance Naruto's combat abilities. It can give him an edge in battles, like allowing for more unpredictable attacks. For example, it could make his shadow clones more versatile.
In some fanfictions, Naruto might use chakra strings in a similar way to how Sasuke uses his chakra to control his sword. He could send out his chakra in the form of strings to manipulate objects from a distance. For example, he could use them to pull weapons out of an enemy's hand or to tie up an opponent.