My 2¢ worth: first of all replace the dark blinds with translucent cordless single cell blinds in ivory or off-white--they let light through and provide privacy + some insulation from cold or heat. Clean, crisp look.That alone will brighten up this space. #2: clear the counterspace!--so much clutter! Where to put all these appliances that get little daily use? Get yourself a ss 24x20 or larger cart on wheels (see Amazon.com--Seville classic ss cart) and store little used, bulky appliances on its shelves--and roll the cart into a nearby coat closet--out of sight and way-- to be wheeled back when needed or individually carried back as needed. 3#gorgeous blue tiled walls.Don't touch them. #4:Walls: keep as is if off-white--not same as trim white white.Just a fresh coat needed.To make it "disappear," paint the radiator the same color as the wall behind it. #5Keep the white trim white--looks bright and clean.Keep kitchen door white. You might want to stop here and make no further changes #6Cabinets: I like Gast pic above on right, but too much blue for your blue-tiled kitchen...IMO. I'd go cooler and lighter...consider the light gray of the beadboard in the Gast pic above right. Beautiful hue. Don't go for the white white everyone clamors for these days.Too stark for your kitchen and too contrasty with the blue tile, too country kitchenish. #7. cabinet hardware: Look like glass knobs in pics. Go for knobs/pulls like in the Gast pic above--or similar in pewter or ss, my preference. Those "modern" ss bar handles don't work with your cabinets. #8 the round table is not a good fit against the wall. Get a small sq or rectangular ss or butcherblock-top table for that spot. Chop off the top tier of your chairs to shorten....and match their tops as they are now so's won't appear to take up so much visual space and still remain comfy--don't replace w/ uncomfortable stools.Keep white. #9. Do away with wood valance over sink window.Too country. #10 Countertops--solid color Corian type or laminate--depends on budget--don't want busy stone textures of quartz, etc. Consider a medium value cool gray. (Or maple butcherblock?). Can't see color/texture of floor.... hope some of this helps. Good luck! lisianthus' pic tho nice is too busy-cutesy for your minimalist aims IMO

Lots of ideas....couldn't resist adding my two cents. i copied your photos and did a little cut and paste- it's messy, but hopefully gets the main idea across. i'd put your sofa in front of the large book case, chair by the fireplace, tv on the stand on the wall opposite the fireplace - so you can either look at the fire or the tv. Someone suggested using frames of one color for your photos - an inexpensive way to do that would be to spray paint them all a dark color-black goes with everything. Since your shelves are a medium tone wood, display things that are dark or light so that they contrast against the wood. Limiting your display items pallette to a few values usually helps to unify things. (I think that's why so many people want to paint the shelves or put inserts in the back to help your nice things read more clearly...some get lost). If you want to "splurge" -you may consider having a carpenter make a few solid tall cabinet doors to provide a visual break in the shelving. I'm showing 3 doors - 1 on the right side of the fireplace and 2 on the left to leave two open vertical shelves for display on each side - with things arranged to frame the fireplace as the focal point. To add some height to your big vases, consider stacking some books beneath them. Enjoy experimenting untill you get something you're happy with - good luck!

@Jayme Hobbs .. thanks a mil Jayme I had been looking at a light grey colour but was afraid it might end up looking just whitewashed but I love the wall paint in the pic. @eagledzines.. I've attached the closeup of the counter, will look into changing the handles just to give the cabinets a lift. @Dannielle Lyn... I was actually looking at glossy black tiles this afternoon and thinking seriously about them so that helped thanks

The trim in your rooms is outstanding. To "tie the rooms together", the one thing I would do is install chair rail the same color as the existing trim. The horizontal lines of chair rail will move the eye around the room and into the next room creating a flow. Chair rail is relatively inexpensive, easy to install and would be wonderful compliment to your existing beautiful trim.