People who get in my way in London
Dunno about you but a pet hate I have in London is people who get in my way. I hate the slow idiots who hog the whole pavement and just stand there while there are clearly people behind them trying to get past. Oxford Street is the best example of this, where it's almost impossible to walk in a straight line for more than a few feet without having to change your course cos of some fucker in front of you who can't walk properly, like some schizophrenic idiot with a problem. Next time someone gets in my way, I'm gonna say "MOOOOOVE OUT OF MY WAY, YOU TWAT!"