I've been on my own quest for artwork for my masterbath and haven't found the right pieces just yet. At first, I wanted to find something so that I could finish the room but now I'm ok with waiting until I come across the right thing... whatever that is!
You have a very pretty room and could go in a number of different directions with your art. So, I'd start with a few questions...
What type of art do you typically like? Abstract, botanical, photographic, etc.
Are you looking to bring in some accent color(s) or stay with your neutral palette?
Your room looks like it leans traditional/transitional... is that consistent with the rest of your house? What type of art do you have elsewhere?
What type of subjects to you like? Scenic, animals, still life, etc.
I think the fun thing about art is that if you like it, it doesn't matter if someone else would choose the same thing.
I think that art.com and Etsy are great sources of inspiration so I'd spend some time browsing there to see if something speaks to you.
Q