Shortly after we returned from Kenya (about a year ago), we visited my sister, niece and mom - all who live near Dallas.
Heather and I had a heated discussion about what to buy for one of the meals we shared with the family in Dallas. It all boiled down to culture shock - we had different ways of dealing with the overwhelming choices at Wal-Mart. (I also wrote about that trip here. The photo with that post was taken on the actual day of the discussion mentioned here.)
So if you are just returning to your home culture - be easy on each other, as you deal with life now compared to life where you were.