
For all the people complaining about buying drinks and then finding that the machine isn't working, or is being used, why not buy a drink you can take away like a bottle of beer/coke, or just buy some crisps/nuts? If the landlord has any sense he will already know you are a pathetic loner and you're only buying the drink so you can go on the machine anyway. Then if some prick jumps on the machine you can eat your crisps on the way to the next pub like the hobo you are.

Most of the time you could get away without buying a drink anyway.
I hate pubs that clearly don't understand that they will generally make more money the more people play the machine, and they put the machine in the middle of the smoking section, or right under the speakers, or right next to some tables so you can't play if someone is sitting there.
I hate playing quiz games with other people, because I am selfish and arrogant and believe that I am always either correct, or most likely to be correct if nobody is sure, and I especially hate people who rubbish your well-thought-out calculated guess because they are sure they "know" the answer, when it turns out they were wrong.
My most hated thing is smoke.
My second most hated thing is the "swarm". I mentioned it on the quiz machine player stereotypes thread. Generally made up of about 10 students who have no real hobbies, don't drink, are shite at pool/table football, have insufficient social skills, but still frequent the university bars and hog the machine. When they eventually run out of money, or the halfway competent player among them leaves, they stop playing but still buzz around the machine meaning that if you want to play it, you will have to put up with hostile comments and possible unwanted screen-pressing situations.
Much as I hate them though, it can be funny to spite them by playing flamboyantly, while they watch and mutter in the background, especially when they say things like "do you know who Vajinal Bob is?", whereupon I turn around slowly with a disgusted look on my face and say "I BEG your pardon!"
Within games, any game where you know from the very beginning if you have almost no chance of winning, e.g. STD when the money is above level 7, or Around the World when the £1 is at 25000 miles and the first three moves are all about 50 miles.
In fact I'm generally annoyed by the trend of some games towards quasi-digital payout schemes, i.e. either gagging to throw the money at you even if you're crap, or utterly fisted and unwilling to reward Herculean efforts, with pretty much no intermediate easy<-> hard settings.
I hate people who write long boring passages about things that piss them off, when they know full well they are achieving nothing by doing so, and should probably be using their time more Fruitfully on organising their food cupboards alphabetically, or washing their shoelaces.