Great thread!

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First, I can't absolutely stand self closing tags without XHTML notation.
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For me, this is a programatical choice. If I don’t use XHTML tags then I am preventing someone else from easily parsing my content, mashing it up, and displaying it elsewhere (potentially as real XML).

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Second, I can't absolutely stand seeing line breaks when the appropriate thing to use are paragraph tags
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Argh! That’s a bug. I hate that too and coded regex to use proper paragraph tags but there was a bug being caused by the difference between Windows and UNIX encoding. New posts will now use <p> tags. Thanks for spotting this Jose!

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Code doesn’t annoy me too much, what usually annoys me is the stupid decisions people make before they write any code, like choosing to use JavaScript to solve a problem instead of trying HTML first. Gargh. Hate hate hate mis/overuse of JavaScript. It’s why I wrote VfE, because a rash of players were coming out that required JavaScript to insert a freeking HTML tag that could have just been hardcoded into the HTML, like, you know, where it’s supposed to go.

I also hate anybody who puts the opening brace on the next line :P

function a ()
{
...
}

What is the point of that!

I hate single line CSS. Single line CSS is for Dreamweaver coders and machine written code. No real sane developer writes a thousand line long CSS file with each property on a separate line and actually maintains it.