Well, I have always been told to refer to the Cpt. as Captain or Skipper, but what do you refer to the F/O as Junior??
Also ask the Cpt, has he heard of PPrune and then tell how much everyone bi tchs about his airline.
But seriously,
Try to find out the head Cabin crew's name and thank her personally on the turn around or on the way out, you get a lot further just being nice and it doesnt cost you anything.
AB