1- Kind of cool. A decent chairlift photo.
2- OK shot. Wish the guy was wearing a different color to make it pop against the sky.
3- Not working for me.
4- Once again, not working. Where's the emotion. Looks like he's just staring off into space.
5- Cluttered background kills it.
6- I like where you were going with this. Nice color matching, but there's no face and no action. I think you've gotta have one of the two to make this shot work
7- I like this, but opened in photoshop it looks REALLY weird. Way oversharpened or something. Not sure about this one.
8- Huh? I really don't like the halfpipe's horizon halfway into the photo. Use rule of thirds here.