Goku's well-known for the energetic, kindhearted, pure heart and caring personality traits. He was taught to be compassionate and respectful to others by Grandpa Gohan. He takes most situations in stride; he rarely lets things get him worked up; he quickly got over losing his tail each time. He is however not without fear. In the anime, he also has aichmophobia, a crippling fear of needles. He is not beyond feeling sorrow, most noticeably seen from the loss of his grandfather. In the Dragon Ball Super manga, he's not above feeling shame, as he regrets his lack of maturity as a person despite all the teachers who have helped him and likewise wants to make his loved-ones proud of him. He also shows genuine concern for the well-being of those close to him. He is well-noted for his love of any food, even by Saiyan standards, which can be comical at times. Like most Saiyans, Goku loves combat and to challenge strong opponents. As such, Goku rarely shows nervousness or fear when fighting. While not arrogant in his abilities (especially compared to Vegeta), Goku has a tendency to be too relaxed and recklessly challenge anyone he views as strong to a fight. Despite his fighting spirit, he is, at heart, a pacifist, as he often spares his enemies, trying to avoid hurting or even killing people if possible and never using more strength than necessary. He also strongly believes that people can change for the better, as he spared Piccolo, as well as Vegeta, in their respective fights, despite the former wanting to kill him and the latter killing most of Goku's allies. This, combined with his naturally gentle nature, can lead to him letting his guard down.

"Hi! I'm Goku! Who might you be?"