Awesome renderings, still rendered with the free Indigo 1 version, right?
Nice and subtile usage of ivy, cool leafs on the water, very natural light feeling...
But please don't JPG compress your image so much... it kills details and my eyes become blocky O_o
I'm not so fond of the purple, but the top image is great
The only thing that bugged me was the water spout on the last image was a little too... cohesive. Shouldn't be a bit more broken towards the end?