Jeremiah

The trait with all saiyans is, that they all do is fight, if goku hadn't of hit his head, he'd be the same way. Broly was just one part of that trait.

Vegeta. Is the perfect example of a in essence a sayian is. He didnt need a fall to the head; it's a trait they all have sure; but we arent given too much background lore prior to the lifestyle and welfare of all sayians. and recall sayians were a monarch. Vegeata being a PRINCE. If all they do is fight... how did they set up a monarch?

I never said all they do is fight, just that it's in their blood. But regardless, you have all kinds.