Design Crush:Bookshelves Done Right

Ever since I started blogging a few months ago I have found that I have a growing affinity for beautifully decorated bookshelves. I feel like I am constantly admiring and saving pictures of all types of bookshelves that seem to make the room they are in look even more fabulous--some are color-coded, some are scattered and others very simple. As well as being functional, these beautiful shelves add color to the room

Which arrangement do you think is the most eye-pleasing? 
…And if you are not sick of looking at bookshelves yet--look here!