One of the things thats really cool about painting with PS is that you can easily come up with several variations on an idea.
I had painted this snow bridge scene and posted it online-immediately my dad gets on and says the left hand path doesn't read so the bridge looks like its going nowhere-
I guess the danger is you can change the idea so much that its not really comparable anymore. Like changing your apple into an orange so you don't know if you are even improving it. Ah well its fun.