Nice shots, the first one reminds me of a song by Talking Heads - 'Road to Nowhere'
The second one I didn't like at first because initially the eyes are drawn to the OOF boats, it actually looks better to me in the smaller version on Flickr. What aperture did you use for that shot?
Third one has really nice colours, you might want to think about cropping out some of the sky or some of the foreground to improve the composition, as it is the horizon goes right across the middle which isn't usually so go compositionally.
#4 I like, the two small figures convey a sense of space and isolation.
The last two don't do a lot for me I'm afraid, #5 shouldn't be so centred.