I was originally going to switch to HTML 4.01. I ended up choosing XHTML because it isn’t forgiving like regular HTML; tiny errors in markup will make browsers refuse to display anything. This will help me have a more correct website according to the specifications.
I really miss this property with regular HTML. This might be a stupid question, but how do I find out if my HTML is valid? I mean, other than running it through W3C’s tool. My browser surely doesn’t tell me …