Facebook. Oh I know, it's not multi-coloured, it's not in your face, it's not made by 37signals or anything like that. It's just GOOD. Facebook actually uses every trick in the book—including drag and drop for God's sake—but you don't even notice. There is so much information going by on the average user's screen that they manage to attain an insane information density without driving users up the wall. Their layout it simple and elegant. They manage to integrate tons of third party applications made by a variety of people with no design sense, seamlessly into the overall system. They give you tons of notices and they are visible without being spammy. They are changing and updating all the time. They let the content do the talking.

But all people do is complain.