Have you looked at the thread in the Gallery on Bedrooms? There are tons of inspirational pictures in there for you.

We just finished a major remodel, in which many 1950s-vintage aluminum casement windows were replaced by Andersen 400 (CXW24) units. The thermal improvement is great. But acoustically, not so much. In fact, the Andersen double pane casements seem noisier than the 50 year old original single pane casements. When the new windows are closed tightly, outside "white noise" (like wind or distant traffic) turns into a distinctive rushing or humming noise. In fact, it sounds as though the window is next to a water pipe with water running through it. Now I like the sound of running water as much as the next person, but it gets pretty tiresome to have it going for hours on end. In the bedrooms. And in the office. FWIW, we put Pella windows in 10 years ago as part of a master bedroom remodel, and they are quiet as can be. I contacted Andersen, and they said that this was something they had never heard of (so to speak). Now I'm wishing we had stuck to Pella. Just wondering if anyone else has experienced odd window noise with Andersen 400 casements?

I think you're going to want to take your color cues from the finishes you choose for flooring, cabinets, etc., especially in the bathroom. Once you have those, start pulling paint swatches that coordinate and take you in the direction you want to go. I've seen some lovely and classic looking barn doors done, so I'm sure you can pull off the look. I have seen people caution against using them between bedroom and bath though, as you may have more light and noise leakage that you get with a traditional door.

Keep playing with drawing til something makes sense. I tried to sketch something out, let's see if I can attach it. Did you want to add a tub, or just a bigger shower? If windows can be added to the left wall, it would really add more possibilities! I made the bigger closet skinny so the window light still comes in. This loses the hall closets so it may need more work. I am not a big fan of the hall between the closets, it was my attempt to keep the window. Either of the closets where the master was could be removed to be a sitting area or a desk area. Obviously I am not a professional. I just like looking at and thinking about floor plans. I am sure others will jump in to improve my sketch by criticizing it lol. I left the toilet and one sink in place. I think the shower could use the same drain and it would not be too bad to extend the pipes to make it bigger, and add the second sink. The entry point is a bit crowded but I was having trouble adding a second sink if I made the bathroom door by the closets.