Annoyance #1: people who sit on the 'aisle' seat of the bus, and refuse to move even if you're loaded down with shopping.
Annoyance #2: the idiotic person, who insists on standing in the aisle of the bus, in some random spot, just so that they can continue talking to their friend. Firstly, it f00ks up the whole flow of people who get on the bus, because they won't bloody move, and because everybody has to push past them. Secondly, they talk in a stupid cockney accent, in 6 syllable bites so I can't bloody eavesdrop. Guy on the bus, you know who you are.