Add to the list: - buttons that don't look like buttons ... What, I have to know that clicking on a plain word on the page has some special significant action.

Add to the list: - buttons that don't look like buttons ... What, I have to know that clicking on a plain word on the page has some special significant action. So your entire app is a collection of easter eggs! Aaarrgghhhh %$#$$@#$#%$!! When it comes to UI, MORE IS NOT BETTER. Web apps would be way better if the system only permitted a few standard interaction elements (fields, buttons, etc) and everything else was display only. But wait - wasn't that HTML 1.0? :)