Considering how much you've put into the kitchen already (much of it sweat equity, but I'm talking materials here), I think it wouldn't be that much more to put a cabinet in to match the others - call the place where you bought the others. They make them in standard sizes for standard fridges, I don't know how deep your niche is but I'd go just to the edge, since it looks like one side is deeper than the other, and trim out the whole thing with the trim you used around the windows and doors. I *love* the curved "rosettes" - very Art Deco looking! That way your fridge would look built in, in a unique way instead of the "trim out with matching side panels" like I have in my kitchen. Can you bump out the wall on the left side of the fridge to even up the niche depth? If you can't afford the cabinets for now, you could just trim out the opening (either on the left and over the top, deadend into the wall, or wrap around the right too and run the trim up that edge on the right of the fridge). I just want to see that sharp drywall edge over the fridge softened like your other beautiful casings!

Too many rugs don't you think? They can't be all over the place. Take awy that one from between your kitchen and living room. Get a reasonable sized tree to visually divide the two areas. Add a simple panel end long console table and place your two sheepskin stools below the console. Install a pair of frame art pieces on the wall. Space is a luxury. Every sq. ft. doesn't have to be filled with stuff.

Don't clutter it up! It looks to me like it's just a wall along a path/hall to the kitchen. All you need is a piece of artwork. Don't put any furniture there at all! There's a lot going on already in that huge kitchen of yours. Not every inch of a home needs to be filled up. Just hang something on the wall that's larger than the mirror you have, and that you will love to look at.

Since hanging bars will not help, adding the two boards -- one attached to the top and one attached to the bottom of your cabinet -- in order to create a pair of open shelves for your stack of washcloths and hand towels beside your cabinet would be the better choice if you cannot find a cabinet that specifically fits the width of the niche you have.