I cant understand how this design type is liked so much. I find the whole "flat" thing confusing and counter intuitive, and these days not exactly new. Given the title, I was hoping for something original.
I agree, flat design is in vogue (and is done badly most of the time). Where were all these designers with their beloved flat designs before Windows Phone came out? Rhetorical question, I know exactly where they were: designing and blogging about faux 3D iPhone-inspired UIs.