For those considering the career of planning, I'd encourage a reading of the following link. This is a very frank article by one of the planning faculty at UNC-Chapel Hill. I find his description of the shift in the role of planners to be quite accurate.
Jane Jacobs and the Death and Life of American Planning - A Must Read for Those Considering Planning
Mods: Maybe we should make a sticky of "useful readings for potential planners"? Just a thought. It really seems like interest in the industry's uncertainties is on the rise.