Jawas- Jawas are considered to be one of the worst forms of alien life in the Star Wars universe.  They will lie, cheat, and steal anything if it is beneficial to them. most jawas make a living selling driods at unfair prices.  (This is how R2-D2 and C3PO come into Luke's possession.)      

   Wookies- Wookies are strong alien life forms with the technology to manufacture highly advanced weapons.  These weapons combined with a primitive lifestyle make them a force to be reckoned with.               

   Rodians- Many Rodians make their livings as  bounty hunters.  This is because they enjoy the hunt of their "prey".  This is what made the Rodian, Greedo, hunt down Han Solo in the first Star Wars movie.      

   EEwoks- Ewoks are innocent looking creatures, but are fierce in battle.  They seek to earn the respect of their fellow tribesmen, and the elders that command the tribe.  But with primitive weapons and intelligents in is difficult for them to win in a battle.

Tusken Raiders- Tusken Raiders, also known as sand people, are primitive beasts that have developed ways to live in deserts.  They wear special eye protectors and breathing masks.  They are known to attack travelers passing through their territory.