He takes most situations in stride, he rarely lets things get him worked up he quickly got over losing his tail each time. He was taught to be respectful to others by Grandpa Gohan. However, after the head injury that caused him to lose his instinctual aggression. When found by Grandpa Gohan, he was unruly and aggressive, wanting nothing to do with the elder, although this was seemingly only when worked up as when initially found by Gohan, he quickly took a liking to the old man. Goku was then programmed with intense hostility to carry out his mission of eradicating all sentient life on Earth.
Originally as an infant Saiyan, Goku was very timid, constantly crying for attention.