Leaving well enough alone.
Usually my eye tells me when to stop.
For me, this was finished.
But then a thought crawled into my mind.
What if no one likes this? Should I add some more elements?
I could. I might even like it. (Be true to yourself, but don't be stubborn.)
But right now, I like it the way it is.
Simplicity is the removal of the useless and the unnecessary--source unknown