Emily, agreeing with MTed, I would like to underscore this phrase:
"then a man that can use the words and pronounce them right, when he has a good air, he's a good singer."
This brings my attention to the fact that many times we listen to a singer (man or woman) and feel that something is missing, something is unpleasant and we can't guess what is wrong. That's the good air, or the lack of it ! Perhaps digging into that phrase, which is indeed very rich, we may find that "good air" is not only a smooth, firm and clean emission, but also a FLOW of an emotional current, a waterfall of a human being in its entirety. Technique is necessary to find the way, the art is up to you, whatever the voice you have, may it be Joe Cocker's or Andrea Bocelli's.
Un abrazo - Andrés