In WildStar,there are four character paths; the Soldier, the Scientist, the Explorer, and the Settler. Each path helps determine the reason a character has for being on Nexus, and it helps determine the sorts of adventures that character goes on.
Soldiers, as the name implies, are there to fight dangerous beasts and to shut down armed resistance.
Scientists are on Nexus to catalog and understand all of the flora and fauna the planet has to offer, no matter how dangerous it might be.
Explorers' jobs are to reach the most obscure locations and inaccessible places on the entire planet, and to deal with all the challenges along the way.
Settlers are there to help build towns, construct homes, and to provide all the things people need to make a defensible home on Nexus.