My kids are constantly complimented on their politeness and good manners. I had good manners with my children while they were young, and they grew up responding the way I responded to them.
But a lot of other "old timey" manners, like saying "certainly" when someone says "excuse me", we've learned from reading old books! Childen's books from 50, 60 years ago! I'm pretty sure that's not a common practice, but it's served us well.
Some parents may expect children to make them happy, but I understand my happiness is my responsibility. I expect my children to be upfront and honest about their experiences and situations, something that isn't perfect here and we work on daily. I see my job as a parent as to develop their talents and recognize truth for themselves, so they may become capable and functional in this world. I tell them all the time, "we're a team!", and we help each other learn and grow. My role as a parent is to keep that goal in mind - both mine and theirs.