If you will have one outstanding virtue, what would you want it to be? Why?

If I will have one outstanding virtue, I want it to develop and use it in good manner because it is a gift to me from God. I must use it in a right way and giving my best to learn more and apply it with virtue. It is my responsibility to act as a man, what i mean is we know the difference between moral and immoral act, that's why, we need to use our freedom in such a way that is better.