The first two have a bit too much sky in them for my taste but it also brings a little too much brightness to the eyes.

Third one I like, it draws you eyes easily down the track.

The fourth one is different but maybe its me but the blurriness of the rocks right in fron of you is a bit hard on the eyes....I wear glasses though. I do like the pic though.

The last one is a little different. I was thinking I wouldn't like it because of the straight on shot style (not very often it is an appealing style for me) but the inclusion of the tracks at the bottom of the picture really makes it work somehow. Not sure why but it just does. Stiil a bit heavy on the sky but a very good pic.

Choice pics IMO...2, 3, and 5