There are so many qualities that could make a person better. Each plays an important part and some will have to work at those qualities harder than others. Some qualities will go hand in hand but all are important.
Here are some personal qualities that I feel is important.
Integrity, Competency, Perseverance, Reliability, Commitment, Creativity, Ethical, Sincerity, Empathy, Focus, Self Confidence, Passion, Attentive, Organized and a Positive Attitude.
Good luck and best wishes.