It is always interesting to see how a developer's background, experiences, and the contents of their "mental toolkit" come together in unique approaches to problem solving and creative thinking. Here's an example of what I am talking about.
Alan Taylor of Kokogiak.com has been building applications with AWS since the early days, starting out with his pioneering first version of Amazon Light in 2003. With version 3 of his site, Alan showed that it was possible to build a complete and highly functional web site using a single CSS style sheet, Amazon ECS, an XSLT transform, and a single "entry" URL. Along the way, Alan has clearly learned the ins and outs of XSLT; in fact I think that it would be fair to say that he more or less "thinks in XSLT" (that's a compliment, of course).