There are many good personal qualities—honesty, positive mind, humility, social, energetic, et.
What do you think is your best personality?
*Note: It would be better to ask, "What do you think is your best personality trait?"
For anyone interested in reviewing some great ways to describe personalities, there is a list of 638 personality traits here: http://ideonomy.mit.edu/essays/traits.html
I think my best trait is also my worst trait. I think I am benevolent but this personality type is sometimes regarded as insincere or simiplistic.
That is a difficult question to answer but for me I would say tolerance. I mean by that, I am tolerant of other views and opinions which differ to my own.
The world would be a boring place if we were all the same. We need variety for life to be interesting. I love to meet new people and learn about their culture and language, it is what makes life fun.
What do you think is your best quality ?