The second one is pretty nice but when you think about it, the scene itself is the good part, the picture really isnt that great I think. I definately think you should have left out the one unnatural light on the left, which takes away a lot from the .. peace of the scene if you know what I mean. I would probably have tried a little more something of a close up here or at least a little.
Tip!
When shooting landscapes on low light, take a small tripod with you or try to get some support on a flat surface of no matter what object you find that was already there.
For landscapes like the first one, in which the sky is very bright, you should really check out graduated neutral density filters (GND). They work very well.
In the third picture I like the way the sun is partially hidden behind the sign and the way it causes a flare but usually it's pretty much of a waste of time to try to make something special out of a scene that isn't very exciting.
The very last is my favourite! Well done with the shadows.
I hope this was of any help, good luck
