I know it makes me the worst type of anal retentive, but I get really wound up by people who can't spell simple words. I find it even more irritating if they just put in a different word.
eg.
Loose - Lose
Past - Passed
Oh, and text speak. What is that all about? I can understand it if you have text message of 160 characters, but on internet chat rooms...
Golf. Why? If you want a walk, have one. If you want to hit balls with a stick then take up baseball or hockey (or go to a specialist nightclub). And it means that Britain now seems to be covered with swathes of countryside in this stupid stripey pattern with little flags everywhere, then narkey people with no friends (just gloating buddies) can look at me in this supercilious/disgusted way when I try to get to somewhere nice through their precious piece of sanitized countryside.
People who think it's a great idea to snap pieces off my car when they are on their way home from the pub. If I could find out who has broken my wing mirrors on any of the four occasions they've been broken while I've been in bed I would smash everything they own with a very big hammer. And I would happily give up the two hubcaps I've had stolen if I could play frisbee with them at the thief's face. And whoever dented my car by kicking it - I'm still trying to hunt you down. I know your shoe print and size.