Well, I had 113 flights as a passenger in 2007 - on CRJ200, CRJ700, BAe146, AvroRJ85, B737, A300 and A319,320,321.
All are different. I always stop whatever I'm doing and watch the brief. Even though I can probably repeat the 'Sauerstoffmaske aus der Kabindecke' speech in my sleep, it is commonsense and good manners to stop and listen. I also read the card - because I don't want to have to remember whether it's a rotate and push, lift and push or other type of door opening if I need to get out in a hurry.
Mind you, the pursers do have a bit of dry humour at times - the theatrical pause when they say "..emergency exits, which are marked by the word......exit" does make me want to say "No ****, Sherlock".
"Right you lot. Sit down, shut up, strap in and listen. Don't annoy the girls, you'll be fed when we feed you and we'll get there when we do. Got that OK?"