I never like the 1 column sidebar since the options are pretty limited when it comes to putting something in there. With a 2 column layout however, I have more flexibility on where I want to put content in the sidebar.
I like the scrapbook WordPress theme for that fact and also because it looks clean and refreshing. Simple, yet elegant and soothing to the eyes.
This WordPress theme will be permanent, starting 2014 and onwards. I hope you all like it.