Good point Nicholas 49. For everyone who doesn't like PA's/their content etc etc there are people who do value them and the same goes for boarding music and pretty much everything else in life.
There are crew members who are god awful at PA's but most PA's are there for a reason. Granted, sales PA's maybe a little annoying but they are here to stay until you pay a decent fare. Sorry guys.
As someone mentioned a few posts back, it is simply good manners to introduce yourself. Particularly on a long haul flight you are going to be in close proximity for a long time so most passengers will find this a polite gesture not to mention, potentially, an ice breaker. If you want a robot/clinical process then thats fine but I guess that would mean me dispensing with please and thankyous. After all, that is good manners too.
Able Tare.... as much as I bow down to your excellent grammar, nobody likes a smart ar*se.