Done or not?

8"x8"
I rarely struggle with whether or not a piece of art is finished. Sometimes I have to restrain myself when I KNOW it is done, but I want to keep adding to it. I think that is the bane of a collagist, always wanting to add more pieces. The collage above feels done at times, but other times it feels trite and over-simplified. I posted it here to see what you think.........