Leather sofas can really dominate the room and can give an overall cold feeling. I would add some earthy elements, like a wood coffee table with glass or metal. Go to Restoration Hardware's website and look at their sofa room scenes. And I'm sorry I think the art is too harsh for the room. That's all your eye goes to in the room. too overpowering. I would look for something softer or maybe a cool mirror and I would add color to the room with pillows and some colorful lamps. I also think woven blinds would look great. They add warmth and give a finished look. The color of your window treatments should contrast your wall color a bit, not match it or else it starts to look generic and blah.. You have warm walls, warm floors and the woven blinds, like Hunter Douglas brand would pull it all together for you.

Have you ever thought about floating shelves? I think pairing a few floating shelves together would look great and would free up space in your living room. I really like the Eugene floating shelf from Bryght and I think it would compliment your existing pieces. http://www.bryght.com/product/160/eugene-cocoa-shelf

You need art on the wall and a rug and color! Your first step is to purchase an inspiration piece. That piece will either be a rug or a large piece of wall art. That sets the color palette for pillows chairs windows and walls. Wall color is last. Find out if you can have electricals inside the wall. I am guessing you are not in US and house is solid brick or this is a basement space as it looks quite industrial.

Hi, You have a very good furniture collection. First and foremost do away with those heavy curtains and go for blinds instead with a light fabric and a red contrast panel on the side. Also do away with the table cloth, only a runner is fine. Try to use a bright colour runner. Replace the runner on the dining area console with glass. Move that beautiful white lamp to the living area on the nested tables. The current lamp looks out of place and too small. You could put some nice tall figurines in brass on the platform behind the couch and a big brass urli below the brown painting