I sincerely hope this isn't a wind up and you haven't registered just to go phishing...
For starters, it's the law that a safety brief is given. You reckon you hate hearing it, we don't particularly like giving it but we all hate the "please explain" from the boss because an irate pax didn't get the briefing.
Aircraft have ditched successfully on water.
Hence the life jacket deal.
Ahh the seatbelts. Yes. You'd think that normal adults could work them out but you 'd better believe that some don't. Especially when stressed. I've had to show passengers how to put them off and more importantly, to release them before getting out of the aircraft.
I agree the bit about where the exits are. I explain in great detail where they are and how to use the door/window. More importantly I explain when and when NOT to use that exit.
I have been known to stop the briefing when the pax weren't listening or to ask them questions. After all, I point out, if it all goes pear shaped, the last thing I will be doing is briefing them again.
However, at the end of the day, it's the law.
I was a passenger on Qantas recently, I liked their style of briefing.