Pata chueca... a matter of aesthetics or a symptom of bad body dynamics?

It is difficult to tell in the picture above whether I am dancing tango or, as Amiralí 'Pata Chueca' has remarked, I am dying to go to the restroom. The foot positioning with respect to each other, to say the very least, does not look elegant. Indeed, it looks like I'm barely holding everything in my bladder. But is it just a matter of aesthetics?

Pata chueca... in colloquial Spanish, it roughly translates to 'crooked feet', and it's becoming somewhat prevalent in milonga floors around the world. It first came to my attention during a private lesson taught by Humberto Décima, who noticed I was pointing my leg in rather awkward angles during sacadas in what I suspect was an unconscious attempt not to step on the follower. Graphically speaking, the toes are pointing inwards, as opposed to slightly outwards, which seems to be more pleasing to the eyes. Pata chueca seems to be a condition that afflicts dancers indiscriminately, regardless of level of dancing... It happens even to the best - I've captured some moments of Chicho and Pablo both doing pata chueca:
Though partially hidden by Noelia's leg, the pata chueca is clear.
There is also Chicho and Juana on the right, with Chicho's left leg lagging behind in motion.

It happens to both leaders and followers. I've observed the pata chueca phenomenon more often in leaders than in followers, especially for performance level dancers, but followers are not immune to the pata chueca.
Fellow tanguero "Maní Salá" commented to me how he realized that some previous teachers in our community had erroneously told followers to push off the floor to create momentum for pivoting, as opposed to the smoother, more preferable pivoting created by the rotation of the torso, and that had caused many followers to have a rather stiff embrace and be imbalanced. I cannot disagree, and I also think that pushing off the floor to create pivoting may be one of the causes of pata chueca... Some photographic evidence of followers' pata chueca:

I believe that if the pivoting momentum when changing directions comes from the torso rather than from pushing the floor, it will be easier to achieve balance on the ball of the foot, which would prevent one of the feet getting stuck static while the rest of the body rotates. All praise is due to Salah for his acute observations.

As for the leaders, I've noticed the pata chueca occurs generally when doing steps involving change in direction, especially giros/enrosques:
Maybe we get lazy and leave the trailing foot pivoting till the last minute, or when it's too late to avoid the 'want to go to the restroom' look.

I admit it... I am a Sebastian Arce-Mariana Montes fan boy. They are an incredible couple, and though they do many more intricate moves that seem to break the laws of physics, whenever they do a sequence of giros with enrosques, the crowd, wherever it is they are performing, without fail, go berserk with applause. Indeed they look smooth while Mariana dances around while Sebas marks the way, almost as if they were skating on ice. I have not been able to catch him with pata chueca.**** I've noticed that whenever he makes turns, he places his weight on the ball of the supporting foot. This allows him to pivot more easily, with little to no lag time between the foot pivoting and the rest of the body rotating. I've tried this, and it's a little hard on the calves... Gotta start training them harder for better balance and better pivoting.

So yes... pata chueca looks pretty ugly, but it also signals deficient technique, which probably leads to turns not being as smooth as they could and should be.

PS: I mean no offense to the people whose pictures I posted or feel alluded to; for that purpose, I posted a picture of myself at the top to show that I am guilty of it too. It's meant to be constructive critique.


**** Edited Nov. 12th 2009:
I was able to catch Sebas doing pata chueca... now you can't accuse me of being biased:
So yeah... basically the best of the best (Sebas, Pablo, Chicho) do pata chueca at some point. With them, though, the pivoting is so quick that the pata chueca lasts no more than a fraction of a second. Maybe that's what needs to be done.