I will add this. I do talk to my pax, when there is something I think they need to know. If we are broke, if we have flow, if we are going to get the ever lovin crap kicked out of us crossing the Chugach, important things that I want their attention about.
I do not make welcome aboard PA's. I only pick up the mic for two reasons. #1 = see list above. #2 = Ding, please return to your seat. (I know this helps the F/A's out if they are out with the cart).
I agree that the folks who really provide our paycheck would prefer a little peace and quiet. They won't ever get is from the F/A's, but they will always get it from me.