But half-Saiyans are more powerful than full-blood Saiyans, so he only decided to race-mix after seeing the potential of Gohan.
Yeah, unless it is a legendary saiyan, and I believe it is only possible in pure saiyans, but then again, take a look at gohan, nowhere strong as goku who is "pure", I believe half saiyan might be stronger at the base level, but don't have the innate growing potential pure saiyans do, as vegeta once mention, he gets stronger everytime he fights, the same goes for goku.
Nah, Gohan has the same growth potential; he was the first to reach SS2 in the Cell Games, even before Goku and Vegeta. The only downside to half-Saiyans is that they don't have the innate drive to fight and grow stronger. Gohan would much prefer to read and study than to fight, but when he does fight he surpasses everyone.
Gohan would much prefer to read and study than to fight
I always chalked that up to his desire to please his overbearing mother, Chi Chi. Sure, Gohan isn't a warrior at heart- but when he's taken away from the influence of his insane mother and placed in the care of Piccolo (well, I suppose he was kidnapped; semantics), he behaves very differently.
If Goku was more dedicated as a father, and didn't always puss out to Chi Chi's demands, he could've raised Gohan to be an absolute MONSTER, with Piccolo's help.
Ever see Dragonball Abridged? It's hilarious, the running joke about Piccolo being Gohan's true father figure, while Goku is basically oblivious to the feelings and needs of his own firstborn son.
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