Mustafa, my apologies for the delayed response! I've been thinking about your dilemma and this is what I've come up with. I'd make the most of the vertical space in the room so that you allow yourself maximum square footage for counter work space. If you're able to, I would suggest putting the refrigerator on the opposite wall (where the tall storage unit is in the sketch). Something similar to this:

Have you search in the "professional" section?

No sunken anything. Miserable to vacuum and place furniture and tripping hazard and soooo dated. There are lots of house plan books you can get in the magazine section of Barnes and noble. I would start there and then consult an architect when you are clearer on what you want.

The layout looks quite resolved with precise space for circulation, privacy well worked in bedroom from living room. I was just curious as to where can be the balcony, verandah or terrace like open spaces that could be the most important spaces to interact with outer world, the open sky and nature-some interior landscape would make your layout a plan - a real landmark.