How important is Professional Development?
Its a silly question. It goes without saying that to develop yourself professionally in all areas is important or get left out.
Fortunately much of what you need in terms of SKILLS in your profession is clear. The newspaper advertisements are specific in what they are looking for.
Thankfully it is also relatively easy to lay out a career vision and career plan that includes specific time targets and milestones on your plan.
Unfortunately the area that is less clear is your Personal Development.