Vegeta is a prideful Saiyan, having a hard time accepting losses and always striving to better himself as a fighter so that he could become the strongest warrior alive. When he encountered Goku and became aware of his increasing strength, it only furthered his drive to become stronger. The rare occasion of his pride differing from just extending to him was when he was blasted away by Future Trunks who he admitted to himself to be proud of as he recovered from the blast.