What are some common tropes found in reincarnation novels, and do they always involve revenge?

Reincarnation novels often feature a protagonist who dies in their previous life and is reborn into a new body, sometimes in a different world or time period. A very common trope is the protagonist retaining memories of their past life, which gives them a significant advantage in their new existence. This can manifest as advanced knowledge, skills, or a unique perspective that allows them to navigate challenges more effectively. Another frequent element is the presence of a "system" or "evolution system," which guides the protagonist's growth and provides them with special abilities or opportunities. The novel "Beast Evolution System: Devourer of Heaven" exemplifies this, where the protagonist is reborn as a lizard with an evolution system, tasked with devouring to become supreme. While revenge is a powerful and popular motivation in reincarnation stories, it's not the only one. Many protagonists are driven by a desire for a better life, to protect loved ones, to achieve a specific goal, or simply to survive and thrive in their new circumstances. For instance, a protagonist might seek to prevent a past tragedy from recurring or to build a new empire. The core of reincarnation is the second chance at life, and the narrative can explore a wide array of themes and motivations beyond just retribution.