His real name is Kakaroto. He discovered that from his brother Raditz which is also the first time he learned that he is a Saiyajin.
Not only is he a great warrior, but also a spectacular leader. Throughout the entire series, he had inspired many, including both of his sons, Gohan and Goten and especially Vegeta. He is a diligent and hardworking person who would never fail to take on new challenges. Even though he had became the most powerful warrior in the universe by defeating Freeza, he still strive to become better. After Future Trunks had foretold the arrival of the cyborgs and Dr. Gero. He could have opted for the easy path by getting to Dr. Gero before the cyborgs were created, but he chose to challenge himself instead by preparing for their arrival.
Gokuís unfaltering spirit and confidence is remarkable. After he forfeited the battle against Cell, no one, not even Gohan himself had the confidence to defeat Cell. Goku was the only one who had confidence in Gohan and followed through all the way to the end, even after Gohan was seriously injured and lost the will to fight. He never quits under any circumstance. Even after everyone gave up, his mind never stopped looking for solutions. Seconds before Cell was about to explode and destroy Earth, Goku realized he could teleport Cell to another location.
His leadership and inspiration was proved pivotal as Future Trunks unveiled the grim story of his time where Goku died of a rare heart disease and everyone except for Trunks were killed. The most tragic of all was that Gohanís tremendous talent was never realized as he died under the hands of #17.
After the Dragon Ball Warriors initial encounter with #17 and #18 and subsequently Cell, Goku realized that he must transcend the Super Saiyajin to stand a chance against the cyborgs. Under his guidance, an intensive training program in the "Time Room" was launched. During that time, he trained Gohan for the first time and fully unleashed Gohan's potential.
The one person he had inspired most throughout the series was Vegeta. Vegeta entered the story as as an evil individual who would find any means necessary to satisfy his hunger for power who was also too proud to accept defeat. Through Gokuís inspiration, Vegeta slowly transformed into a good hearted person who accepted himself. During Gokuís final battle with Majin Buu, he openly accepted that he was no match for neither Buu nor Goku and willing to participate in the sidelines (by gathering energy for Gokuís final strike) rather than the actual fight.