I agree with the whole kill this and loot that, but this is Bioware! The quest dialogs are amazing! But yes, achievement is a cheap way to spending time, and tbh I dont have a good substitute for it, if its not creating other areas and/or npcs/companions.
My point was that several achievements are a sad excuse of trying to keep us interested between patches, and currently, if wow is anything to base shit on, its way to far between 7 boss raids <.<