Lighting plays a huge role in how a room feels. I notice that you have little lighting in the rooms other than the ceiling pot lights - a table lamp tucked in a corner and the cylinder thing, also in a corner. That's a start, but I could envision more table lamps and a torchiere in there. You might consider cross posting this on the Home Decorating forum. Here is a link that might be useful: Home Decorating forum

I would look at inspiration photos to see if you prefer rooms with dark, medium or light walls. It will help you narrow things down a bit. Many paint stores will come to your house and give free colors consultations. It is hard to give advice without seeing the space.

With all that dark furniture I wonder if dark flooring would be a good idea, although I don't know how well dark furniture and a light floor would go together. You could always cover a large portion of the floor with a beautiful Oriental rug with colors that you love and then pull your bedding, pillow and drape colors from that. You could still have a white duvet and focus the color on the pillows. You could choose a soft, pale green for the walls and take that as your inspiration for rugs, drapes, etc. I do think some of these items should have patterns with added colors such as yellow, pale blue, green and a touch of pink or terracotta to add warmth. I would look for pictures on houzz and elsewhere for traditional bedrooms and that should give you wealth of ideas.

I can say I might trump you on living in a dreary area! I'd buy some 4 poster boards from Michael's or where ever you have locally cut them in half so you have 8 pieces to sample 2 colors. Leave a 2" border of white all the way around and paint the rest with any of the colors you choose or any I have mentioned. I'd go for City Loft or Aesthetic White. Shoji is another that will lean slightly gray, but I didn't sample it as I'm familiar with it in other spaces and for my space and furnishings in the eat in sunroom I knew it would not work. It really is a lot of work, but to get it right.... You have some interesting colors and the only way to know is to try even though it's a pain. I'm not done, but here is a photo of Aesthetic white in my sunroom. TALK ABOUT DREARY and you can see high it leans a bit slight gray. I cropped the photo as this is the only spot I have 2 coats to have you best see. The room has three taller windows left and right with a paned single door to the backyard and on the back wall 4 large paned windows so there is a lot of light in this space. As you move in to the kitchen it's not as bright, but the light from the sunroom toward the kitchen makes the paint look a pinch lighter more like the bottom of the photo. I hope it helps you and as I mentioned paint can change from room to room. I found it a nice compromise I was very torn between Egret and City Loft and Aesthetic White all having slight nuances that differ, yet barely. I had used Aesthetic in an office I did recently and loved it so I tried in in my home and well.... I do love it and will use it more in the future.