What disturbs me more than anything is the sometimes extremely poor delivery, even in their own language. The Americans like to make it a race and see how many words per second they can manage! Foreigners whose mother tongue is not English can also often rush their announcements making them totally unintelligible. I have come across plenty of good examples by foreigners too of course. In fact on some occasions I even made a point of praising the person for their very clear PA. The worst PA I recently experienced came from the captain. He must have held the mike about a foot from his mouth and proceeded to mumble his way through both in his native (German) tongue and English!