12Prince of the Saiyans
Vegeta might be the vainest character in Dragon Ball Z. He’s loud, he’s obnoxious, he doesn’t play well with others, and he always has to be in control. No doubt this behavior stems from the fact that he is royalty, the Prince of Saiyans (or King depending on how
you look at it), which can't help but inflate what would already be a bloated ego.
Before their mass genocide, the Saiyans were quite the alien race to be reckoned with. They spend their lives, from the day they are born to the day they die, fighting and destroying. Thanks to their naturally high power levels, they were a force to be reckoned with. Like a race of outer space Spartans, the Saiyans are bloodthirsty and relentless, making whoever rules them that much more cruel and vicious in the process.
After their mass destruction, Vegeta is one of the last survivors of this race, and proudly proclaims himself to be Prince of the Saiyans. While he is always trying to achieve a bigger power level than anyone else, his arrogance and ego are unsurpassable by others.