I, too, was taken aback the first time I was handed the container to
pack myself. I like to do it now - the restaurant wouldn't know that I
left something because I didn't care for it so would pack it anyway.

Our local restaurant specializing in seafood serves a seafood alfredo
that is to die for - full of crab, scallops and shrimp. It's so
filling that I can never finish and often finish up taking the leftovers
home, but they never seem to taste quite the same when reheated
carefully. Darn it.