Not that many of you care but I just converted my .asp site to .php and HTML 4.01 Transitional to XHTML 1.0 Strict;
Um...................what? 
<WARNING: I'm about to gloss over a lot of technical details.>In the beginning there were HTML pages. These are your average website's style: someone designed it, put it online, and you see it exactly how they created it. If the owner wants something changed (bigger text, new information, etc) then someone has to go in and edit the code. This is much like a newspaper: you get exactly what you wrote but you can't change it on the fly. You have to go back, edit, and republish any changes.
ASP stands for
Active Server Pages. Here you can design how a site looks (title at the top, menu on the left, the latest news articles on the right) and the server will go out to get information for you to fill in each field. In simple English, this is more like the stock ticker at the stock exchange. The minute something changes, BANG! it's updated.
PHP is another way of doing what ASP does, but there is an important difference: ASP was sculpted by and is supported exclusively by Microsoft; PHP is open source and everyone can use it. So no matter if your server is Windows Server 2000, Redhat or Ubuntu Linux, Unix, Apple, or powered by a gerbil, PHP will work. ASP requires a Windows server.
So in saying I went from ASP to PHP I'm saying that I went from a Redmond, Washington based satanic cult worshiping the Devil reborn to a California based slumber party who's outside toasting S'mores. It also means that I am much more flexible in how and where I am able to host my website.
With me so far?
Now, HTML 4.01 and XHTML 1.0. In writing website code, there are several bars by which to measure your code. There's barely running, meaning your code sucks but Internet Explorer can figure out what you meant and get the idea across to your visitors. That's ok for personal sites with few visitors or for companies that got ripped off by their web consulting firm. Well written code is judged by the
World Wide Web Consortium and has various levels of "correct" code based on how anal retentive you are and your own personal comfort level with masochism.
HTML 4.01 Transitional will let you get away with a lot of errors and in general is like that grandmother you had that let you steal from the cookie jar regardless of how often you beat your brother to a lifeless pulp. XHTML 1.0 Strict is closer to the drill Sergeant from Full Metal Jacket, but only after he's drunk plus he recently found out you knocked up his sister.
So in saying that I'm XHTML 1.0 Strict, I'm saying that I really can code a website properly.
If any of that didn't make any sense, eh, don't worry about it. I'm just saying I'm a geek and I enjoy my hobby.
[edited for clarity]