Pop-Ups
I start with the no brainer of all time. Like most of my hates there are exceptions when they might be used but rare is the case successfully made for the use of browsers that open unexpectedly.

If it were a mere annoyance I might learn to live with it but Pop-Ups notoriously ruin navigation and have browser controls (such as the address box) removed.

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10 Things I Hate About Everyone

1. People who point at their wrist while asking for the time.... I know where my watch is pal, where the hell is yours? Do I point at my crotch when I ask where the toilet is?

2. People who are willing to get off their ass to search the entire room for the tv remote because they refuse to walk to the tv and change the channel manually.

Why Star Trek Sucks: