Well I completely agree with the points already mentioned.
Another point for me was the effects of your individual gameplay decisions for the game world itself.
Things like the church and the orphan come to my mind (he moves to the poor quarter if expelled) or the thing with the rivalling merchants in Verdistis (the story with the burning cart) or the whole story line about the friendly female assassin-prostitute.
The humour was also awesome. The philosophic debate of the two skeletons, the debate of the women about their men (and their own sexual adventures) and some of the gravestones. Pretty cool stuff
