Well it's good you had some good experiences on US. I'm a FA for US based in CLT and I really do try to hang up coats asap, serve a PDB of passenger's choice, address passengers by name, be friendly and engaging. But I don't always succeed, occasionally on domestic, I won't serve PDBs if we are late. Some LUS FAs will be like the ones you found on AA and hide in the galley for the rest of the flight.

FAs can be really hit and miss especially on US carriers, you'll get good FAs and bad ones. I just hope that you mainly get good FAs on your flights.

Oh, and I don't do all that "Hello I'm blah blah" crap. I am from the UK too