Idea for Our Kitchen Wall - My Favourite Exposed White Brick Wall Inspiration! (Hally's, a California-inspired cafe in London, creates a homey feel with shiplap siding, exposed/painted brick, warm woods and painted furniture.
I wrote a whole post about swapping your bookcases for wall-mounted shelving. Wall-mounted shelving takes up less space, and can almost appear to blend in with the wall. Image from Stadshem, via Freshhome.