Compositionally these are weaker to stand on their own.
The colors are very attractive in general. I can see the HDR effect though. that's because I am used to photomatix. If these are not HDR, then
to your sensor and exposure!
I don't like the color mismatch between the foreground and the background in the last one. It seems less plausible that there would be such discrepancy of color temperature in nature. [I am not saying that wasn't the case though]
The sky in the first is brilliant. Just needs something in the foreground to make it more interesting.
Good to see you around Peter. We definitely need to catch up upnorth at some stage.