!I usually hold open doors for people that are entering at the same time as me or are following close behind me.
This! I am an older female, and it doesn't matter what the gender. Or if they are coming out and I get to the door first. I usually let them out, then go in.
It's always nice to be acknowledged, but it doesn't always happen. You can't give people manners if they were raised without any.
It's always unpleasant to have a door slam in your face cause the person ahead of you doesn't have common courtesy. I can excuse them if they are not paying attention due to having their hands full- literally, or with young children. If they are totally oblivious due to just being out of touch with people, then I shrug it off.
My kindness always comes back in mysterious ways!