When people slurp while eating. I'm like, SRSLY, EAT NORMAL! WTF IS WITH THE SLURPING! TAKE A FREAKING BITE, AND SWALLOW THE THING!
When people walk into my room without knocking and saying "OOHH! WATCHA DOING? CAN I PLAY ZOMG YOUR MEAN!"
....Seriously, at least knock! That's why there is a...