How many times have you looked at your strengths and weaknesses and became determined to improve your weaknesses? You compare your weaknesses to others who are better in those areas and strive to beat them? Does this ever cause you to beat yourself up because you keep coming up short?
What about your strengths? Those are usually the areas where you have some natural talent or a passion for what you're doing. Your strengths are where you excel and find enjoyment. Why not do more of that? You like it. You enjoy it. Take what you're good at, and do it more!
Are there weaknesses that you still need to work on? Probably. But your greatest growth will be in running your strengths.