People you have the misfortune of following into shops, only for them to suddenly stop dead just inside the door as though they're in awe. C'mon guys, this isn't Mr Magorium's Wonder Emporium, it's WH Smiths, and it might amaze you but they're are actually people behind you trying to get in too.
Also, people who can't walk in a straight line that you catch up, head for a gap to their right, only for them to veer diagonally to close the gap, so you drift left and the bugger blocks you off again. It's often old folk with humped backs and shopping trolleys.
Also, my neighbours across the road who only ever come over when they want something, be it for me to second a passport application, or because one of the kids hasn't got a key and wants a piss, or they're going away and want us to look after their cat, or they want a witness to a rental agreement for University Boy etc. etc. Despite the myriad parties and social gatherings they've held they've never invited us, but we have to listen to their hour long goodbyes at 1:30am from our bed, then they lean out the window at 9:30am and complain that my mowing the lawn is disturbing them after a late night. They've even come out and asked our guests to park their cars elsewhere because they like to do a u-turn out of their drive rather than having to turn around at the end of the cul-de-sac like everybody else has to do when their guests do the same to us. A family of twats.
Oh, and people in general.