i like the idea of making a frame (plus filled in) of pictures on the wall as a head board. I can feel the love and happy memories from the pictures as i go to sleep :) although as my experience has taught me i would need to do something more to the pics than just tack them on the wall.
I love peaceful, calming bedrooms and his one is no exception! The little bit of trim molding on the wall showcases the art work in a beautiful way (and easy to do). Remembering to paint the ceiling is a great way of making the room feel complete!