Picture Frames for the Master: Help Needed

So instead of committing to some colourful or crazy, super designerish decor for the master bedroom, my husband and I cleaned things up, went with white and neutrals and embraced the clean and simple look.  Overall, I'm happy with it.

However, the empty spaces on the walls throughout the bedroom, I am not so happy with.

These spaces are empty because, well, we're not sure what to fill them with.  I think we have decided on picture frames with our own black and white photographs (cheaper and more sweet and personal for a bedroom than art).

The spaces I am looking to fill are directly above the headboard (pictures #1 and 2 below) and to the left of the window (picture #3 below).  Now the question is:  how big are the picture frames, how numerous and what do they look like (colour, width, style).  So here are a few pics of the "empty spaces" in my bedroom .... would love to hear what you think I should do.

(Yes, my bedside table is the messy one!)

(The light fixture is next on the list)

Apologies on the pictures, it's really tough to get far enough back to get the whole room in (and I was too lazy to clean up the entire room so didn't want to show the whole thing :))