I thought about this every time I saw the thread. To be honest, I'm really not sure. I'm often quite reflective of life, myself included; however, I actually had to ask my Mom once, lol. A girl wanted to know my strengths and weaknesses. I instantly knew the later, but the first left me wondering. She gave me a flattering list, but then no person loves you quite like your Mom!
I feel arrogant or boastful when it comes to things like this, so most times I'd rather not say. In any case, though I don't know my 'best' quality, I know that two which are often commented on by others are patience and kindness.
Trust me, I have light years to go in these and every other department, but that's what I hear. Hope this'll do. Thanks for the thread, and God bless you!