Oh, and a couple of tall candlesticks with vintage ceramic doves or love birds or such sitting on top of them would make the light fixture seem less far away. Paint he candlestics in one of your two accent colors.

I love the walls, the woodwork, the floor and the table! :You have a great base. Now you just need to bring in something really big and dramatic. The painted sign ought to be by your back door or in a craft room.
This room has the bones of country elegance and has tons of potential. You need to find a cohesive message/theme and pull it together that way. I would choose a fabric for table mats or one of your cans at a starting point, and then work with that.
Coffee, "do what you love", little tiny yellow picture frames painted randomely on the walls - none of this is the going the same direction.
The picure frames are a great idea - just go big with it and use a simple color scheme like creams, browns, tans and then add just a couple of colors, something muted for the country look.
I am going to bet you have lots more really cool stuff hanging around. Lay it all out and pick the things that work together, picking a variety of textures. Have fun!

I found 88 of the tins, but ended up selling all but 4 of them, so that's why there are only a couple for display. :

Room looks beautiful. I wouldn't cover those windows. They're beautiful. If light or privacy is a problem, I would get roll up natural matchstick shades or white fabric shades, which disappear. With 88 tins found I would have used more of them vs just a few scattered and made a gallery on one wall using frames in the same color family. Maybe down the road you can get a better light fixture as with such a pretty room the light fixture is pretty bad and hung too high. Lighting is every bit as important as every other element which brings a room together. When I see a dining room I imagine sitting down as a guest there and although this one looks nice, it's not warm and welcoming due to no rug and too high and probably too bright a light fixture. You could add a pair of candlestick lamps to that side table in the meantime vs. using the overhead light.

I was planning on putting up some curtains, but I don't think I will be going with a rug or different light fixture right now. I'm also not able to center the side table, otherwise there wouldn't be enough of a walkway through the dining room. I didn't really think of my art style on the walls as "country" - just kind of shabby chic mixed with modern which is the style I like. The art is significant to the room & has specific meaning since I used materials/items that were found in the wall. What type of curtains would you guys suggest?

Floors and walls look great. I echo Decor Enthusiast's thoughts on the wall decor. Spot on advice. What are your thoughts for window treatments, light fixture, and rug?

Looking good! I agree with below, you're not quite there yet. Get real art as the stuff you have on the walls is not working. Get a proper light fixure hung at the correct height over the table. I can undersrand wanting to show off the floors and trim, but curtains and a rug will soften the space. The tile table that is serving as a sideboard is not working It needs to be wooden to work in this space. Try getting something closer in style ect as the table. It doesnt have to be real matchy matchy.

You've done a great job with the walls! Lots of work, I'm sure. Your table is pretty and very contemporary, but your artistic efforts are a bit too country kitchen for it. Know with most of them you're just having fun and memorializing the effort you put out for this room. When you're ready to bring the room in tune with the dining suite you have the basic bones in place for this to be an elegant and intimate dining room. Post again when you move forward to complete it. Meantime, I would center the side table under the two coffee klatch pieces and lower them to about a foot above it. Love your PA cans - would be great by the back door or in the laundry room later on. I wouldn't consider it done yet, but you deserve a break and you still have exciting things to dream about for the future of your room.