although a CDQ is not necessary for approved charecters to take prestige classes they do not hurt. Especially for those interested in furthering their charecters developement and becoming known to the people around them. An example would be an approved Pale Master, someone becoming more like the undead is a major life change and no reason a person shouldnt really consider a CDQ for it. Or a dwarven defender thats no where near his clan hold, a CDQ could give the dwarf proper motivation for those special abilities they are granted.