Oh man, I hear you. I discovered this site earlier this year too and we've made some really positive changes. My dh has been pretty good about going along with it but there's a limit to how far he wants to go and Christmas has turned into kind of a challenge.
I've had a couple of epiphanies over the last week or so. One is that, while I enjoy giving gifts and feeling generous, I only enjoy it when it's inspired by the thought that "this is something the recipient will really like." A lot of the gift-giving that happens in dh's family, though, seems to me to be inspired more by competition, or a desire not to look cheap. So even if you find the perfect gift for someone, it's not good enough if it only costs, say, $10-$20.
This has always annoyed me, but having adopted a much more mustachian mindset since last Christmas I can hardly stand it. The most ridiculous part about it all, to me, is that everyone in dh's family is a well-paid professional (including us). We are all perfectly capable of buying whatever consumer nonsense we want, so if there's something we don't have, it's because we don't want it or have decided it's not worth the money. Yet we all waste enormous amounts of money on this weird passive-aggressive game of oneupmanship.
It's going to take some deep breathing and tongue-biting to get through this. Thanks for the safe place to vent!