Well, all those positive qualities count. What comes to mind first?

Honesty, compassion, a loving nature, strength of character, respect for self and others, open-mindedness, a sense of humour, and some degree of humility.

I don't give a hang whether they believe in "God" or not...I've met wonderful people and not so wonderful people on both sides of that particular matter. Besides, there are so many ways of believing in God or not that how could you ever get it all nailed down? ;-)