There's a fanfiction titled 'Tony's Departure and Rediscovery'. In this story, Tony leaves NCIS after feeling unappreciated. He travels around the world and has various adventures, eventually finding a new purpose away from the agency. It delves deep into his character and his insecurities that led to his decision to leave.
Sometimes it's to create drama. His leaving shakes up the whole dynamic of the NCIS team, which makes for an interesting plot. There are relationships within the team that are affected, and new storylines can emerge from that.
There is a fanfiction called 'Tony's New Chapter' which explores what could have happened if Tony had taken a different path in his career within NCIS. It has interesting plot twists and keeps you engaged throughout. The author does a wonderful job of staying true to Tony's character while also adding new elements.
Tony Dinozzo is a character full of charm and charisma. In fanfiction, we can see him in more personal and emotional situations. Writers can take his humorous side and expand on it, or they can show his serious and determined side in different ways. Moreover, the NCIS team dynamic is always interesting, and fanfiction can explore how Tony interacts with the team in various fictional situations, which is really appealing to fans of the show.
One possible reason could be that he wants to pursue a different career path outside of NCIS. Maybe he gets an offer that he can't resist, like working in a private detective agency where he has more freedom.
One great 'Tony Dinozzo leaves NCIS' fanfiction could be the one where he leaves to start his own private investigation firm. It shows his growth and independence outside the NCIS framework. He uses his skills in a different way and has to deal with new challenges.
One great 'Tony leaving NCIS' fanfiction could be 'The Aftermath of Tony's Departure'. It explores how the team copes without him and delves into their individual memories of Tony. Another could be 'Tony's New Beginning Away from NCIS' which might focus on Tony starting a new life and career outside of NCIS, maybe in a different field of law enforcement or even something completely unrelated like running a small business. There's also 'Remembering Tony: The NCIS Team's Reflections' where the team members often think back on their time with Tony and how it has shaped them.
In fanfiction, when Tony leaves NCIS, it often makes the remaining characters feel a sense of loss. For example, Gibbs might become more withdrawn as he has lost a key member of his team. Ziva may struggle with feelings of abandonment since she and Tony had a deep connection. McGee could feel the pressure of having to step up more in Tony's absence. The team dynamics change significantly, and they have to re - evaluate how they work together.
Often, the story might follow Tony as he adjusts to his new life. He could face initial difficulties in adapting to a different work environment or routine if he gets a new job.
Often, his character is shown as more independent. For example, he might be more willing to take risks without the constraints of NCIS protocol. This allows him to grow in ways he couldn't while at the agency.