I just finishes my agent story, thats my third 50 after the inquisitor and the warrior.
I gotta say, none of there class stories are particularly better or worse than the others. the agent was nice because it doesnt deal with supernatural elements all the time, but the ending was kinda disappointing. the endings of the warrior and inquisitor stories are much much more satisfying. Id consider the warrior story the best I have seen yet, but I had most fun with the inquisitor, not that much because of the big picutre, but the small stories and the choices are really fun.
knight is next, cant wait for it.