My colleague Joen Asmussen writing about the process of shaping the new default theme for WordPress 3.6 (that happens to be powering this blog now):
Designing Twenty Thirteen has been a pretty remarkable experience, mainly because I got to work with such an amazing community. There’s nothing to temper a theme into shape like hundreds of people submitting patches. It’s as much a privilege as it is a learning experience and the design has changed so much since my initial mockups, all for the better. Here’s how it all started.
Joen and the WordPress community have outdone themselves with this one. I find myself saying it every year, but I don’t see how I’ll switch away from this one.