As Lohen noted, no classes but rather free skill assignment.
Of course, each set of skills varies as to what stats it works best with. So having a character who is focused on brute force or agility may not work well with something that requires intellect or charisma.
Still, it leaves open the possibility to do something that isn't equal to the best masters out there (such as having a warrior who can heal their own wounds during down time, or who can serve as a poor emergency healer, for an example). What each person chooses to do will be an interesting thing to see.
Finally, to get various skills you have to do things. Exploration and knowledge are important for that.
