Disagree with opinion four: Everyone buy gift because it is an obligation, not because people really want to.(This is opinion 5)
Couldn't agree more with opinion 7: He think that not just holidays, also other special occasions, for example the graduation of his sister, his sister got a lot of gift in money too, he think it's just about opening gifts. (This is opinion 8)
opinion 9: He heard that when someone received more than a few gifts he or she even can't remember who gave them the gift. Instead, why not write letter for advise for the future, it will be more special.