Common themes in 'Live Life Again Naruto Fanfic' include the exploration of 'what if' scenarios. For example, what if a character had made a different choice at a crucial moment? Another theme is the power of knowledge. Characters use what they know from their previous life to gain an edge in the new one. This could be as simple as knowing the weaknesses of an enemy or as complex as understanding the political undercurrents in the ninja villages and using that knowledge to make positive changes. There's also a sense of gratitude and making the most of the second chance at life, which often leads to characters being more proactive in their actions and relationships.