Is there in your opinion some personal characteristics that are recurrent in successful researchers? What is your opinion about the following personality traits? 1. Intellectual curiosity, 2. determination, 3. self-motivation, 4. competitiveness, 5. team-work capabilities, 6. humbleness, etc. Are there other relevant issues that I have not mentioned? Do you feel there is a logical importance ranking among the above mentioned characteristics? Do you think the ranking depends on the specific research field or on other issues?