What is opposite your desk? I think that's the only wall we haven't seen. it must be the one below in the ceiling fan photo. With the style of your windows and color of the trim, I think I'd do the walls with a specialty treatment to get the Old World plaster warmth going. You may find a wallpaper that replicates that look, if you like the look an prefer paper. The photos would tell me to turn the desk to float, centered on the window so you can look out. Your chair would face the window with your back to the bookcases, although I might move those to the wall we haven't seen. You have one full bookcase and one mostly empty. Bring in some decor items and style them with 1/3 books, 1/3 decor and 1/3 open space.

Unfortunately all your options require custom work: It looks like you need an 18" corner cabinet. You will have to modify the last wall cabinet on the left. As I am eyeballing it, you should be able to cut the last cabinet in the middle and then shorten the left section to fit the space of the wall next to the door trim. It's an option that makes the area looks symmetric. Or you can install shelves over the sink. I would not recommend it because it will take the looks away. And the last option will be to remove the last cabinet, shorten it so it fits over the sink and install a single cabinet where the double one was. This will leave a triangle space behind the corner where the two cabinets will meet. You can block the space under it. Hope this helps!

Your white walls are too stark for your wood trim. Softer whites and other tints might warm up the room. Lots of Houzz discussion lately on best paint colors for rooms with wood trim. Here's a classic Houzz article about some great colors that work with wood trim like yours: https://www.houzz.com/magazine/11-terrific-paint-color-matches-for-wood-details-stsetivw-vs~9025200 Here's a Google link that comes up with the search: "paint colors for wood trim" http://www.google.com/images?client=safari&rls=en&q=best+paint+colors+wood+trim&oe=UTF-8&hl=en&sa=X&oi=image_result_group&ei=wtHIVPT-OcyYNtWehLAN&ved=0CC0QsAQ Additionally, like the others, add some lighter pillows to your couch--or a couple cozy throws--based on colors in your rug. A large round glass coffee table would showcase your beautiful rug as well. You could add accessories on the coffee table in colors from the rug. Yes, hanging plants in each window.

Light Sheer Curtains will look good, do not forget to add a pelmet to cover the ugly rods . Either have wells stitched curtains or buy good ones which fall well. The beauty of a curtain is not only in the colour , but also the type of fabric and the stitching quality. Do not compromise on any of these. You can have a light 1/2" grey trim vertically on the ends of the curtains also, this will define the curtain space. The cushions can be silk plain ivory long cushions, ideally 16"x 12" . Do think of having a nice jute breathable rug again in a greyish ivory combination. A few good ethnic floor lamps will bring out the beauty in place. An extra tip would be to invest in good ceiling lighting