Would you please give me some advice/comment/solution to my wonder?

Q.1 Here is about light. Comparing picture one and two, they have very different light in the background. I thought that completely dark background could help to bring out the subject more. I think it work out ok for the first photo. However, if i also give some light to the background, i can see more details ont eh second photo too. Which one would you prefer? 

Q.2 Here is about the third picture, it is my attempt to make the picture blurry. I know this photo is not sharp or anything, but I think the effect come out to be quite nice, the tree looks more lively, maybe ... However, one cannot really say if this photo is any good. Do you have any opinion over this one? Is it even work? do you like it? if you don't like it, the blurry thing bug you or anything, could you please let me know? I would like to know how people think, maybe i would decide if i will want to make it again or not :P