I would say Mr. Ax who I don't like listening playing Chopin. With all his reputation, concerts, experience he just doesn't have what it takes to truly play Chopin. Technique is not enough. A pianist has to have heart, certain state of mind, and a passion to play Chopin. Ax's dinamics are poor, he doesn't breathe along with the peices, doesn't put it through his heart.
Not anyone can play Tchaikovskiy or Chopin, no matter how good they get technicaly, there is a lot more to their music...
I have Mr. Ax's DVD of Chopin Concerto No.2. He was like mumbling/singing when playing.
It's true that once one gets through the tech, one still has to deal with the expression in Chopin's music.