I don't LOVE the rug. but I think the green curtain, built-in shelves filled with books and the (presumably) sliding ladder are wonderful. Its missing a fire place, lots of cozy blankets and an oriental rug!
PACK IT IN wall of framed paintings between two doors Fill blank wall space with a tight arrangement of eclectic artwork. To keep the wall from looking cluttered and random, make sure the artwork has a similar feel like all of these paintings.