The thing that I really hate is 'call waiting'. Someone rings you, interrupting whatever it was that you were doing. You give in, sit down and prepare for a long conversation, hoping to get back to your sewing, cooking, tidying, whatever later on. Then the other person says 'oh sorry, I've got another call coming in. I'll ring you back'. You have no way of knowing how long that call will take, it could be 2 minutes or twenty, so no point in picking up where you'd left off before the call. You hang around, wasting time, 15 minutes passes and you think, Oh what the hell, I might as well turn the oven on, get out the ingredients. Just as you start to weigh the flour, the phone rings. Aaaaggghh! Sorry, but I just think that is so rude - it's a kind of assumption that you have nothing better to do all day then be at the other person's beck and call.