Methinks you failed to grasp what I was saying. there are two types of tags, those that have content, and those that do not... when I say tag I'm referring to the entire element -- the opening and closing of the tag with it's content; basically in the DOM sense of it.
> means this is a starting tag. </label> would be the end of the tag.
/> is the close of the tag.
If I've scrolled to where I can't see the opening, using HTML 4 I don't know what tag it is so I can't be sure if it's an opening tag or a self-closing. Always using /> means I can always make that determination even if /> is all I can see... saving me the bother of scrolling up to find out.
A common formatting method if you practice the 76 rule -- which is why real programming languages that have a block structure are CONSISTENT in it's application. Something HTML is a miserable failure at and really the only thing XHTML gives us that's an improvement.