You were taught correctly by your parents and probably teachers
There are a few things I am trying hard to keep.
I try to take off my hat when I enter a public building.
I believe that a handshake can still be a window into someone’s character (though not in isolation)
I believe in “Please”, “Thank You” and “You’re Welcome”.
I make a point of opening doors for my wife...especially the car door. I think it amuses her...:)
I hold doors for everyone. I will say, though, that one thing that really frosts me is when you do hold a door open for someone, they walk through it as if they were entitled.