Many organisations are now talking about managing people according to their strengths, rather than the traditional approach where weaknesses are addressed. I find this new strengths-based approach (being used in recruitment, selection, evaluation, development, project management) very interesting on several levels.
In my experience, people seem quite keen to talk about their strengths; at least, they are keener to do this than share their weaknesses (or 'development needs' if you want to be PC). This also gives the whole area of organisational evaluation and development much needed energy and enthusiasm, which is a fantastic outcome. For many employees, annual appraisals were occasions to be endured; now they find that their managers actually want to talk to them about the things they excel at, which makes people feel a whole lot better about themselves, more motivated and more engaged,
The idea of playing to your strengths isn't new of course, but the suggestion that you no longer need to be a well-rounded individual at work is. I think there are some key skills that you have to develop, regardless of your strengths, particularly around the 'soft' interpersonal skills. At some point, therefore, you may need to look at areas where you are deficient. In order to be truly effective in the workplace, an understanding of how to identify and build on ones skills, knowledge and experience, as well as ones strengths, is required.
It seems to me that the thrust of strengths-based management reflects the position of Positive Psychology at the moment - erring very much on the side of the positive rather than focussing on the negative. I think what is required for both to be sustainable in the long term, however, is a more holistic approach.