Hey There: Window Coverings and the design of the house must go together and furthermore you must keep the function in mind. In you case I do recommend to layer the window coverings... As I can see in your pictures, you might have a privacy problem if your don't close your coverings, but of course your don't want to sit all day in the dark. So as a first line of defense (literally spoken of course) you go with minimalistic pleated or honeycomb shades. They fit nicely into the window casing and operate bottom up and top down. This will give you privacy and light management and allow you to look outside and enjoy nature around your home. As the second layer you can opt for curtains to the side - either operable or just decorative. This combination is not to heavy to take over the rooms. Stay in lighter colors but don't match them...lighter for the blinds and a bit darker for the curtains. Good Luck with your project www.PleatedBlindsStore.com

IMO the darker drape does not work with the sofa. As for snarkey I will say that to have blinds to keep out the sun is the worst choice I like to be able to see out of my windows so I choose solar shades to control light and heat they also give you day time privacy and then I add drapes for nightime privacy . As for what to se for drapes I would need to see the whole space and no matter what you choose make sure they are the proper length

It's difficult to see how much space exists above the arched window, but if it's feasible, you could mount the rod to align with where the angle changes, on that wall.

The height of your panels works for the room, leaving the arched top window to be a view to the sky. Is there a reason to go higher? if so you can do an arched to set of panels or top treatment. Please keep in mind that you have at least 1 more window in that spacey and if you do a higher treatment on that window it may bring down the height of the room and be unbalanced with the other window(s). I agree that shades inside mounted would look good if you need light blockage, and I prefer to have panels out further to each side exposing more of the glass. .....Did that help any?