Across the assorted Dragon Ball franchises, Goku is generally portrayed as a friendly and helpful person just trying to be the best fighter in the universe, but he was not always that way. In his earliest years, he even rivaled Vegeta for brutality and cruelty. As the saying goes, Goku has mellowed with age. His laid-back cheerfulness as an adult is most obviously illustrated by his knack for befriending his enemies and turning them into his most die-hard supporters. Moreover, despite being commonly despised by his opponents, it's rare to observe Goku giving them the same hate back. According toDragon Ball Z, as a child Goku was downright Vegeta-like in his ruthlessness and brutality. Indeed, considering his youth, the friendliness that Goku exhibits as an adult is perhaps less the reduction of his having a pure heart, and more of a side-effect of his quest to be the best. That is, Goku helps and is friendly with others because it is in some way helpful to his goal to become the ultima...
