If you have to deal with people in your work you need to be patient and love people.
I think that it's the most important qualities in this case.
Even more important than to be quick thinking.
Because even if you can't think on your feet well you will became a professional after a while.
You will definitely get confidence in yourself with your forthcoming experience.
Whereas, to love your neighbor is vital for some professions as a psychologist, a nurse, a teacher (it would be better to say "loving your neighbor", maybe?)...
Once, I read a blog of a doctor who hated his patients.
He described them with irony like very stupid creations always trying to harm themselves.
The heroes of these descriptions remained anonymous, but I could imagine how I would have been shocked if I have distinguished me or someone of my family there.