I can't speak for the other members of the team, but I choose what I like and jumps out at me as being a good photo.  It may not always be technically perfect. I'm not an expert myself.  I try not to choose anyone that was in the week before.  I try to encourage new photographers.  To show case their  work, and let them learn more what we are about.  I hope this helps you understand some of the choices we have to make.  There are hundreds of photos posted each week.  We only pick 30.  So if we miss one you like, well that will happen. 

 ecurb - The Devil