Start with looking through photos and saving them the ones you like by adding to your ideabooks.

The blue is awesome (grey is too trendy)! The reason it stands out to you is perhaps because it's the only real colour there. Bring in the blue in a window treatment, a small appliance that sits on the counter, a pretty tray or area rug. Also, it is more appealing often if there are more than 2 colours - so right now you have a white and blue colour scheme - bring in red or orange or fushia - something from the other side of the spectrum (like you did with the yellow flowers but in a more permanent way)!

If you think hitting the lamps could be an issue, just move them a bit and add some low accessories (opposite sides to pic below). It's better to have a bit larger lamps and with your ceiling height anything shorter would look skimpy and they don't overwhelm the bedside tables once you balance with something above the bed. Just a thought...if you accessorize your bedding with some soft colors, they will also help to compliment the glass and crystal. You could even change the hardware to a silver.

Add colour . Please add colour haha . Just a thought though , instead of paint ( its a bit hard for me to visualise everything from your description -- I am a visual person ) how about maybe those translucent blue looking tiles ( yes , I know , extra cost ) , you may even 'frame' them in the white tiles to tie in with the shower , or possibly do the blue instead of the white , or even do the shower in them , and have the rest your 'white' walls . And when I say about those tiles , you can get them in square or subway or even long skinny ones , or even long and skinny but with long skinny darker blue and brushed ali ones too -- in other words , have fun and add interest !