Out of politeness I pay attention to the safety briefing. However, when I'm on my 6th flight inside four days on the same type and with the same airline, I can assure you that I do find it a little superfluous. I believe that most REGULAR travellers know how to fasten and unfasten a seat belt; how to use an oxygen mask and don a life vest. Don't slate me though because I do mentally perform my own safety briefing so that I am prepared to act if the **** hits the fan.