Our “new” house was built in 1970. I want to add box molding (not sure if that is the correct term) to add texture/interest. The room will be painted a gray blue, and the box molding will be painted the same color.

My first problem is that two of the walls are already “busy” with windows and doors. Would it be strange to not do anything to these two walls? No box molding. I preferred to do all four walls I just don’t want it to be overly busy. And I can’t figure out how to do them.

The second problem is that I need help figuring out approximate size and number of boxes.

The third problem, is that I want to add crown molding. However, there is an air vent that would slightly be in the way. There is also a beam that would be in the way, too. The crown molding and doors will be painted Benjamin Moore Sea Pearl.

I would really appreciate some advice on any or all of my three problems.

Below are four pictures of the walls. The first picture is the wall my bed would be centered on. The second picture is the wall directly across from my bed where I will have a large gold armoire centered on it. Pictures two and three are the other two walls that have doors and windows. The last two pictures are of the bed and armoire, but in my last house.
Thank you!!!
Lara