First of all, I love your green stools! I say go for a LARGE piece of colorful art. (Check out allposter.com. - I got a poster of 1932 Good Housekeeping cover for my kitchen that I love.) But, one person noted that there is not enough (or not a lot of ) room around the table, so I would not get anything that protrudes from the wall like sconces or 3D art.

If you don't "need" anything there (e.g. command centre bulletin board), you can leave it blank. Not every wall needs something on it. That's how we end up with visually cluttered homes. For a rug, look into a Ruggable. They're washable and come in a wide variety of colours and patterns.

In the long run, I would change up the siding above the garage doors, as Tozmo suggested (I would probably wait until I was painting the exterior to tackle it, though). Add some horizontal trim to divide the two siding zone. Change the direction of the siding, or switch to a wide board-and-batten siding, or do wall shingles. Googling "mixed siding homes" turns up lots of examples. If you are into holiday decorating, you could reserve the space for a giant spider at Halloween, a huge wreath (or pair of wreaths) at Christmastime, and a flag for the 4th of July.

I'll be watching to see what works for you. We recently purchased a home that has a 10' wide by 8' tall wall with "cake icing" wall with lots of dips and swirls like the one on the lower left of your wall. I've thought about purchasing razor a couple of scrapers, several packs of replacement razor blades, and a misting water bottle to take off enough of the big swirls (to something closer to yours) and remove some of the gloss paint, giving the razor scraper places to dig into and scrape off more of the painted surfaces. At that point, I'm stumped. I'm not confident in my skimming skills to get a smooth surface. I'm looking at two options: do the scraping, then apply a shorter, softer texture using watered down drywall compound, then paint with low gloss paint which makes the wall less noticeable. OR just tear out the sheet rock and replace with new (which wouldn't be as expensive as yours would be, but I might be overrating my skills again and I'd still have to cover it with texture anyway. I hope you get some good advice and share the outcome! Best wishes,