What is the biggest trait a personal trainer should possess? personality? seriousness but shows results?

Not sure I could narrow it down to one (maybe honesty? with self, clients, employer, media, business community). However, a personal trainer with the following characteristics/traits would be magical:

-dynamic personality
-fabulous communicator
-certain degree of humbleness
-able to think on feet (or knees, hands, head:)…)
-well-educated and experienced
-empathetic
-ethical
-professional
-respectful
-healthy role model (in & out of gym)
-body of god or goddess (just kidding:)