#1. The mountains in the background need a bit of help. You can use ACR or Lightrooom and increase the exposure on them a tad. Nice perspective.
#2. Consider doing some dodge and burn to add depth. Nice composition
#3. Has some halo's or other artifacts going on wher the sky meets the hills.
#4. Shiprock? You could dodge the shadowed side to reveal more detail and add a gradient in the upper right corner to compensate for the loss of polarizer effect because of the locarion of the Sun.
#5. You could add gradient to the sky to pull down the exposure there.
#6. Nice leading lines.
#7. The OOF partial cross in the near forground ruins it for me.