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)!

I've heard that these are no good because they tear the wallpaper off the wall, which isn't exactly ideal considering you've just wallapered your house - maybe hooks would be better instead

Far out! This bathroom is amazing. How did you make the light? Definitely a work of art within itself! The glass door is also amazing, I'm such a fan of stained glass in the right circumstances, and this room is definitely the right circumstances. I'm in love.

My inclination is something with colour and with a connection to elements already in the room. A dark timber frame and a deep coloured strong image, wide enough to link across the chairs and not seem squeezed between them. Here's a random red-toned image from the internet that I have stretched into a dark wood frame. The hues link to the cushions without matching tightly and add richness and warmth.