<p>Why is there a need to evaluate answering performance? A person's reputation on this site - in the everyday sense of the word - is not determined by metrics.</p>

<p>There is certainly a purpose to the reputation system (write good answers => get more privileges) and to the badges (making people want to achieve goals that are good for the community), but what I (at least) think of people here is determined by their behaviour and their answers and not by those numbers. Using a different metric will not change that.</p>
