His sense of pride could be tied more to his craftsmanship. Instead of just his ninja skills, he would take great pride in the weapons and items he creates as a blacksmith. This could lead to a more subdued but deeper sense of self - worth, as he showcases his creations to the yaoi - centered community around him.
Naruto could become more of a peacemaker. In the context of yaoi fanfiction, there might be relationship tensions among characters. Since he is a respected blacksmith, he could use his influence to calm things down and resolve conflicts, which is a bit different from his more brash and action - oriented self in the original series.
He might become more patient. Blacksmithing requires a great deal of patience, and this could seep into his personality. He would have to be meticulous in his work, which could make him more detail - oriented in his interactions with others as well.
He might become more brooding. The new powers and the vampiric nature could make him a bit more withdrawn as he tries to understand and control his abilities. But his core of kindness would still be there.
His confidence would likely soar. Naruto has always been confident, but as the Sorcerer Supreme, he'd have an even greater sense of self - assurance. He'd know he has the power to protect and make a difference on a much larger scale. He might also become more reserved in some ways, as he'd have to deal with more serious magical matters and might not be as quick to jump into action without thinking first.
Naruto's personality could become more complex. He was always an optimist as a ninja, but as a shinigami, he might see the darker side of things more often. However, his core values of friendship and protecting others would remain. He might be a bit more reserved in expressing his emotions as the shinigami world may have different social norms. But overall, he'd still be the same Naruto at heart, just with a different perspective on life and death.
His already positive personality would become even more so. He'd be like a beacon of hope. He might be more focused on bringing out the best in others, since that's what Blue Lanterns do.
His personality would become more reserved. As an assassin, he couldn't be as open and friendly as he used to be. He'd have to keep his emotions in check to avoid being detected.
Naruto's personality would become more brooding. He would be less impulsive and more calculating, like Batman. He might not be as openly friendly as he was before, keeping his thoughts and plans more to himself.
He would likely become more irreverent. Naruto is usually quite earnest and determined, but as Deadpool, he'd be cracking jokes all the time, even in serious situations. With Fem Kyuubi around, he might tease her constantly. For example, he could make fun of her tails or her sometimes - haughty attitude. His sense of morality might also shift a bit, becoming more in line with Deadpool's grey - area ethics.
He might become more vulnerable. As a monster, Godzilla was powerful and feared, but as a human, he would have to face the fact that he could be easily hurt. This could make him more cautious and less aggressive.
Naruto's normally sunny and optimistic personality would likely become darker. He might be more brooding and less quick to trust. His sense of humor would probably take on a more sardonic edge as the power of Jack of Blades seeps into him.
Naruto might become a bit more reserved. Since Ulquiorra is a rather cold and stoic character, Naruto could start to hold back his more exuberant emotions. He might also become more analytical, like Ulquiorra, when it comes to combat situations. Instead of charging in head - first all the time, he'd think more about the best approach.