#1, I like the idea but would like to see the whole model in focus. I prefer the second photograph, like the perspective. In both, I'd prefer a blank backing. If you post process, I bet you could get the colours to really pop in this one.
#2 again, I do like this idea. Anything with green in t works for me, love that colour. Nice composition, I'd like to see a tad of the left and bottom. Few distractions in this one: twig middle left and small stone on the left edge.
Cheers.