Hey Vince, you made me laugh...I guess I did run on with the negatives huh?? Sorry guys!
Hoofer919...I am generally a follower but...IMHO here are a few of the things I have learned from dancing with women...
You can tell a woman that loves to dance by her radiant smile on the floor (sounds corny I know, but its true). I have seen ladies of all levels that I could watch dance for hours simply because the love it so much! Great examples; Ruthie Perkins from Nashville, Elizabeth Richardson from St. Louis, Blair Underwood from ?, and Cheri Read from Milwaukee. A special note that Ben and Shalene Ermis have the most radiantly happy looking students on the floor. This couple knows how to truly put joy in their students dancing.
You can tell a woman that's arrogant when she keeps leading her own head snaps in Tango

You can tell a woman who is vain when she spends all of a swing watching herself in the studio mirrors...uh who was I dancing with?
You can tell a woman who doesn't practice alone when she knows all of the patterns but just can't seem to be over her own feet.
A lady who sings along with the music...must be pretty happy with your lead, or at least is trying to make you think she is!
You can tell a woman who is inexperienced or a bit timid because she won't drive through the center (thus stepping back and slightly side almost invariably causing her to cross her feet when she should pass).
A thoughtful follower is the first to say "Oh, we missed it, let's try it again"
A well trained follower will follow you into hell and back...you want to lead hand to hand passes against line of dance, she's there for you

The number one identifier of a fine, thoughtful, confident dancer...they're the ones that single out a beginner, a shy student, or an older student who struggles to stay on time and asks them for a dance. They are forgiving, honest and encouraging. Though these people are not always the best dancers, they're the best dance ambassadors, and the best people in my book any day.