Are Saiyans The Alien, Or Are Humans The Alien?

[Sovran Nila]

Since Dragonball Z is told from Goku's perspective, does that make Saiyans the alien, or does that make Humans the alien?

 

[Spiral-Force]

Given the bonds Goku formed on Earth, and him wanting to avoid association with Raditz, it would be the former. Though a Saiyan on the same page as him (F. Trunks - fights bad guys, grew up on Earth) will be treated like one of the team, though the F. Trunks situation is a rare one.