to be clear, even though i ranked them, my bar for a good film is whether i'd watch it again or not, and all the ghibli films i've seen, except perhaps arrietty (i haven't seen earwig or earthsea, but the consensus seems to be against those as well), are well worth watching again and again.

grave of the fireflies is heartwrenching for sure, and absolutely worth watching again (when you have tissues and a loved one to hug nearby).