QA professional should have below mentioned 16 necessary traits.

1. Be a skeptical (doubt) visionary for the development work
2. Never compromising with the identified issues
3. Ensure end user satisfaction
4. Think from user perspective
5. Prioritize Tests
6. Never promise 100 % test coverage
7. Be open for suggestion
8. Start Early
9. Identify and managing risks
10. Do market research for the assigned project
11. Develop good analyzing skills
12. Focus on negative side as well
13. Be a good judge of your product
14. Learn to negotiate
15. Stop the blame game
16. Finally be a good observer