JCLP: If "personality may beat brains" when it comes to success, is it possible to work on our personalities?

http://time.com/3640300/for-success-at-school-personality-may-beat-brains/

Studies show that students who are “conscientious, open and emotionally stable have the best likelihood of succeeding at their studies.” Bill Gates was considered a genius even at a young age, but he also grew up with an open and competitive family. How much of his success was due to his natural intelligence versus the personality he developed in such a specific environment?

V1 Par Up Close: Bill Gates Lesson 1 Week 7