YOu might desagree with me, but in a place like Gaia where avis look so weird people can't tell what are they supposed to be (stares at my avi(yaaaay)), having classes is simply useless.
Its easier if you just say your avi is whatever you want it to be and leave it there.
I honestly like mage class but I alway schoose a mage kind of class and I don't see mutch sense in choosing that class again.
IF it is used a class system (I never heard the people from the battle system saying there would be,and so I doubt there will be any), Ihoped at leas for them to have classes more adequate for the world of Gaia.