4 and 5 are really nice!
Nice vanishing point on 1, but something about it is turning me off. 3 is a nice representation of the bridge, i like the mood of that image; very lonely feeling for me.
the cat image is very nice. I like that one the most. Composition seems good on all the images. a bit of constrast on the other images would bring out the shadows and black to give the images some real depth -might even bring out more of the colors.