look forward to reading all the replies.
I note a huge difference in environment between DCL and the other piers(?). The other piers, the porters all have their hands out - big time. Not at all with Disney - to the point where we may have forgotten to tip on our last cruise.
with the other piers, we feel obligated to tip, kinda like insurance so that our bags make it on the ship. I remember one cruise where one porter was basically singing a song about making sure you tip your porters.
I notice the same thing with Southwest at FLL. The skycaps are shouting for tips - telling you that if you don't tip, you gotta stand in line. The same SW skycap at BUF, has probably never been tipped.