All of us have them but the real question from a personal and professional leadership standpoint is what should we do about them? In the old days of positional leadership everyone was encouraged to work on improvement in every area so they could be the best overall leader possible.
Of course if our weaknesses are in the character area we must do whatever it takes to eliminate the wrong attitudes and negative behavior. Beyond that spending a major amount of time trying to gain some small advantage in any area where you have no skills or passion is basically a waste of time.
Regardless of the time invested and the seminars attended if you are not creatively wired then you probably never will be. If you are not gifted at project management then just working at it harder and longer will not produce significant results.
For the maximum amount of return and to make the largest impact you must prioritize working in the areas of your strengths. This is where you are naturally strong and your passion fuels what you do every day and not your job description.
There are many different types and styles of effective leaders. What you must determine is what do I uniquely bring to the table for the leadership assignment I have been given that sets me apart for this specific role.
You may be a nine or ten in only one particular aspect of leadership but if you know what that is and you primarily stay in your strength zone then your ultimate impact will be incredible. Most people are not willing to pay the price to be a ten at anything they had rather spend their time working on their weaknesses.