I've written software for over 20 years in various industries, languages, and disciplines. I've always been "fair to middling" with HTML, CSS, etc... I wanted to tell you that I've learned more about the nuances of semantics in HTML and CSS "tricks" (meaning the great enhancements that have been baked in over the years), and accessibility from your rants, raves, and teaching. And for that I say thanks. :)