For my part I remain neutral in the Decisive Moment cliché debate. This is not that I cannot make my mind up but more than I see both sides of the argument. I see the decisive moment as a technique that needs to be understood and can be learnt and then applied as required. Most pictures have a decisive moment or compositional climax it is just that Henri Cartier Bresson was the master of obsessional timing which was realised in a blink of the eye or the press of a shutter.
What I like about Bresson’s photographic skill was that he treated it like drawing albeit an instant drawing. He saw the camera as an extension of his drawing skills and says himself in the documentary Henry Cartier Bresson The Decisive Moment (1973):
“For me photography was a means of drawing. That’s all. An immediate sketch done with intuition and you can’t correct it. If you have to correct it, it is the next picture. But sometimes life is fluid and the pictures disappear” .
He also says
“Everything around us is in a state of constant change or evolution, new ideas or opportunities can only really manifest when the right elements converge to open the window for something to happen”.
He was not concerned with technique as people seem to be today. While the subject matter was at times complex and thought provoking and a vignette of life in a single frame, he was not obsessed as it appears photographers are today with camera specifications, sharpness, millions of pixels, and post processing techniques. In fairness this maybe the hobbyists rather than the professionals.
According to Bresson
“To me, photography is the simultaneous recognition, in a fraction of a second, of the significance of an event as well as of a precise organization of forms which give that event its proper expression” 
So while technology cannot sort out the geometry of composition or the narrative in the picture, modern cameras can now help the photographer capture a decisive point in time. The burst facility at 6 or 7 frames per second will ensure there are a number of just slightly different images to choose from to get that right moment. One can argue that the so called ‘spay and pray’ technique is completely at odds with Bresson’s ideals but it will ensure the image is captured.
So what is the antithesis to the decisive moment? Putting aside what I jokingly call the indecisive moment (where I have tried to create a decisive moment but just got the timing so wrong) I would suggest William Eggleston’s democratic photography would be a great candidate. In democratic photography all subjects are treated equal, there is beauty in the mundane, “the glorification of the trivial” and in the image all element in the composition receive equal weight and nothing should dominates. (See https://swissrolly.wordpress.com/2015/03/09/william-eggleston-from-black-and-white-to-color/)
Bresson’s says of his image Sifnos, Greece, in the documentary Pen, Brush and Camera (1988) that he only took a few shots. He saw the geometry of the composition and waited for someone to walk into the shot. Firstly it was an Orthodox Priest in full regalia who past but felt that the balance of the scene was wrong. Then the child ran past and that was the image we see today.
What I thought would be interesting is compare Bresson’s final image against what Eggleston would might have done in the same situation. In other words saw it as it was, record as is, and walk on.
For me I like both images. Yes we are used to the Bresson version but the one with the subject removed is just as powerful but in a different way hence my current neutrality on the subject. It will be interesting to know how I stand in the future as my knowledge of contemporary photography develops through this course.
  Henry Cartier Bresson The Decisive Moment (1973) International Center of Photography/Foundation HCB, Director: Cornell Capa, USA [online] https://www.youtube.com/watch?v=hyhMqDfmG9o [Last viewed 27 Mar 2015]
 Rachel Keith(2005) Encyclopaedia of Twentieth-Century Photography, 3-Volume Set p433 Volume 1 A-F Edited, By Lynne Warren
 Cartier‐Bresson, H. (1952) Decisive Moment Simon and Schuster, New York, p. 2.
 Pen, Brush and Camera (1998) BBC,Director: Patricia Wheatley UK [online] https://www.youtube.com/watch?v=ei45S87R2dk [Last viewed 27 Mar 2015]