Vegeta Bio.

        Even though he is evil at heart, Vegeta is perhaps one of the most strongwilled characters in the series. Like Son Goku, he is extremely industrious, constantly striving to be better, but different pursoses drove Vegeta's spirit. Goku fought the defend the lives and others and to challenge his limitattions while Vegeta fought to satisfy his bloodthirsty appetite and die hard pride, which is unwilling to accept defeat. This gradually changes throughout the series.

        The primary driver of his will is Son Goku. Vegeta's defeat in his first encounter with Goku and his unwillingness to accept Goku being more powerful had constantly fueled his strong will to continue to train himself. After seeing Goku turn into Super Saiyajin and defeating Freeza, he grew even more jealous of Goku's achievements and immersed himself in intensive training. After much sweat and frustration, he finally became Super Saiyajin. He only enjoyed a fleeting moment of pride in destroying #20, before being defeated by #18.
 
        Vegeta's first catharsis occurred during Son Gohan's battle with Cell. Because of his rash decision to attack Cell when he didn't have the power to, had caused Gohan's arm to be seriously injured when Gohan saved his life. Not only was he not even close to Cell's ability, but also served as a hindrance to Gohan. That was the first time Vegeta accepted his incapabilities by making an apology to Gohan.

        By the time Majin Buu appeared, what used to be a cold-hearted Vegeta changed. Right before he proceeded to sacrifice his life in an attempt ot destroy Buu, he told Trunks that he cared about him and how he felt bad about giving Trunks much less attention then Trunks deserved.
Vegeta Bio