A pet peeve of mine is reading back a clearance and ending it with the word "confirm". In the area I fly the worst offenders are pilots from India, Philippines and most of the Arab countries. One of my recent JFK flights a Royal Air Maroc was given a clearance, he read it back correctly but ended with the word "confirm". The New York controller answered him "Ya either got the clearance or ya didn't, got no time to confirm". The answer if you can't cope is to "Say Again".