a) you have a floating lamp, unconnected to ceiling
b) the external door/window view is all wrong. You open up that door? and fall to your death? Put a balcony if you must have that sky
c) I would reduce the size of that oval table or move it away from the couch
d) lengthen/widen that room and to give it more space to look better.
e) wall on the right is too dark; the room is a) lit. the room is b) getting a lot of bounced light from the sky
a) all that light and its still so dark?
b) sink is wacky chromey. too blue
c) bevel your edges, the sufaces are just cube now aren't they. bevel to add realism and make it look just that bit better.
d) handles on your drawer things
e) put some plugs in. where do you connect your microwave..etc.