I friggin' love Hobbits. Not only do they only take a couple hours to paint, but they wear different outfits in every movie. I decided to base Pippin among rubble from Minas Tirith, keeping with the "historical" accuracy of the movie.
I,ve just painted this hobbit as well (not as good as yours though) I like the tree that you have on yours i,mm going to do the same, you could try putting some mud on the bottom of the cape, I did it with mine and turns out quite good. Did you follow the guide on GW site?