It may be more of a personal preference, but I dislike Internet Explorer. Yes, this includes all versions, especially the new ones.
One thing that absolutely irks me is opening the browser or opening a new tab. There is no way to stop it from loading the homepage (if starting the browser) or from loading their abso-freaking-lutly stupid 'You have openend a new tab!' page. I know I opened a tab. I did that on purpose.