You have a lovely space! But it's very very brown. If this was my space, I'd paint the ceiling white, paint the window & door trim black (yes, black. See how nice youur black curtain rods look next to your doors?) and leave the walls white washed. I would also beef up the ceiling beams, they are too skinny and don't look structural. Refinish the floors slightly darker, less honey coloured and a more matte finish. Add colour to your room by replacing couch, drapes and area rug. Go for less pattern in fabrics and rug since you have a lot going on with all the panelling. Good luck!

That is a lot of pine and painting will hide the knots where staining won’t so I think you need to decide the look you want.I am not a big pine lover so I would probably paint the walls take the ceiling back to natural colorand hopefully the ceilings and the floor would be the same as the ceiling to keep finishes to a min.Stay away from any yellow hued lighting , so no Edison buls anywhere. Use LEDs in 3500-5000K range to keep the light as close to natural sunlight as possible , most of my clients like 4000K range for lighting. I think a lot of the feel will come from your furnishings , art and rugs.

I would leave all the walls and ceiling, but, paint the windows and doors black. Its a beautiful room, and has so much personality, I would hate to see it look like every other house around.