
There are conveniences and benefits to levelling multiple classes on the same character (cross class skills, for instance, or the ability to change to a crafter class to repair gear on the fly) that would not be available if people stuck strictly to what their character's IC occupation is. What about those whose IC jobs are not available to be leveled?
I can see why someone who has a character who wears armor ICly would want to level a warrior class in order to look the part, but that's about as far as it goes in my mind.
I can see why someone who has a character who wears armor ICly would want to level a warrior class in order to look the part, but that's about as far as it goes in my mind.