Their are many different types of beings on Earth, that will make my Ultimate Android Superior.
Humans: Weaklings. Such inferior creatures. Although some humans have the potential to control ki, but it takes much more practice than other aliens, since it is not natural for them.
Saiyans: The Saiyans are a savage warrior race originating from the planet Vegeta. Saiyans by birth bear monkey tails and are able to transform into Were-Apes by looking at the full moon. This transformation is charactersized by turning into a huge ape and usually destroying everything in sight.
Namekians: From what Vegeta said, Piccolo is a Namek. Don't know what it is except their physical attributes include green and pink skin, two antennae protruding from their foreheads, they possess the ability to create Dragonballs.
Changelings: Frieza's race are alien beings that can change their shape to become a stronger person.