wow - i think its beautiful...
very nice sky, love the lighting on the columns/posts of the building.
if there were some way of making the tree stand out a little more, maybe the outline, with keeping the darkness, thats the only thing i can think of! but as a newbie, i have no idea if its possible and if so, how to do it...

i read somewhere that a photographer that has a future will shoot a gazillion pics, all slightly different, of the same scene/item, and end up with only a couple really good shots. its the 'not being scared' part that helps you take chances and learn and experiment. (this is pretty much exactly how i shoot)
i do, however, also agree with your idea of limiting shots, and tweaking things to make it 'just right'. certainly worth trying!