This one is mainly for all you hand coders out there. When making your sites do you make your HTML/XHTML strict or do you go for transitional? I was also going to take it further and give the option of saying if you use the URI doctype or prefer to have the browsers render your work in quirks mode but not everyone is familiar with the difference between strict rendering and quirks mode.
Personally I use HTML 4.01 transitional. I prefer to use the URI to make the browsers use strict rendering but as my site contains an example of IE filters I had to make it render in quirks mode.