I agree with a lot of the notes above, but I think the biggest thing working against you here is camera lensing. I realize that clients like wide shots to see it all, but this makes for an unrealistic pov and skews the perspective lines in a way that never looks right. Also, you camera Y position is higher then human eye level, which does not help. Going even further, I think you might be perfectly centered and mathematically straight on, which is unnatural to the human experience.
Try setting your camera to eye level with a 50 mm lens. You won't get the full kitchen, but you almost never can in reality - look at architectural magazines and ads. Set your P (pitch) angle to 0 and use the offset fields in the camera attributes to adjust height subtly. This will keep the verticals truly up and down. Find some interesting angles and tight details. Architecture can rarely be captured in one hero shot, though I appreciate that we get asked to do that all the time.
I would also vote for more dressing and some art or shelves to break up that massive brick wall. Some post production to increase contrast and play with levels and balance can help too. Great start, keep exploring!