My sister-in-law Leslie works for Blackberry Farm, a luxury resort in the foothills of the Smoky Mountains of Tennessee. Last time I was there we toured some of the resort properties and I found the FarmHouse to be insanely cool. One of my favorite things about it was how they used painted pine instead of traditional drywall throughout the interior of the house. This is an alternative for drywall that really adds some amazing character.
Here is a shot of the Master Suite on the first floor of the Farmhouse. You can get a good look at the various widths of pine (which they painted dark brown). Simple and so clean.