"What is the best way to look for one´s chief feature?" someone asked. Simply see yourself. I do not know how to explain it better. It is possible one may find something -- chief feature of the moment. It is imaginary personality; this is the chief feature for everybody.
"Can one alter one´s chief feature?" asked someone else. First it is necessary to know it. If you know it, much will depend on the quality of your knowing. If you know it well, then it is possible to change it.