All I can say is WOW!. I noticed the quilting stood out more in the upper left hand corner than it did in the lower right hand corner. Maybe that's what is tugging at you. Both have not applique, which I think is nice, so I wouldn't applique anything in the blue corner, although that was my first though. Perhaps a quilting patter that is tighter and in a more contrasting thread that what you have used? The thread and quilting really stand out in the upper left. Perhaps that could be echoed in the lower right. You have done a marvelous job!