I am not usually a white wall advocate, but in your space, i think it works well with everything you have going on. I know you don't have a ton of space, but I would pull the table out from the wall, even a little bit. It makes the space look more cramped than it is. I think I spy some green in your accent pillows? How about a vibrant green accent wall to really pop some color in there? Depends how much of a pop you are looking for. Also, with the coffee table, it is really small in comparison to the sofa. I think you can get away with a larger table and larger rug to anchor the space. it may actually make the space look a bit larger. I think you've done a great job so far! Good Luck!

There are all sorts of very light muted colors that would work beautifully in your space that wouldn't overwhelm it. Here are a few that would look nice:

http://www.benjaminmoore.com/en-us/paint-color/spanisholive
http://www.benjaminmoore.com/en-us/paint-color/windchime
http://www.benjaminmoore.com/en-us/paint-color/octobermist

I would pick up on one color from your dining room chair upholstery and either paint one wall a vibrant color of it or do the whole room in a very muted version of the color.
If you don't want to do an entire paint job consider just adding some pattern in a color to match the chairs....

Lower your art and wall items. 5-5-75 will help - center points 5' above the floor if alone, bottom frame 5" above furniture if with something and keep size to 75% of the furniture's width it hangs above. Lower them and switch the clock and piece by the door. The bottom of the clock can go where the bottom of the picture was above the light switch. You need a larger area rug and that's where to get your pop of color. To block the kitchen view you might use bead chain curtain.

I think it would be worth a try to move the loveseat to the other side of the couch so it is floating between the living space and the kitchen. It might define the space more without blocking the open design too much. And then get a larger rug to anchor that space. And then what everyone else has said. . .lower the art, center the dining table under the pendant, etc.

I think the room was well put together. Try adding some accessories to put on the table!

-Fratantoni Lifestyles

Kind of like the white also. Try turning the table so the short end is up against the wall. Put two chairs on each long side, facing each other. Bring the other two chairs into the living room area, maybe facing the loveseat. This would create a conversation area. You can always move the table around for more than 4 diners at any time.

I think there is blue in your dining room chairs, if you want more color, you could use that color but perhaps in a shade or two lighter. Purchase a pot of paint to test a wall, to ensure you want something other than white. Adding a blue rug in your living room will also provide more color. When entertaining, you could place a portable shoji screen between dining room and kitchen. When not in use, it could be palced behind your couch as a nice backdrop. [houzz=]

I would suggest using a grey or mauve color to add some contrast and make the room look bigger.