I went thru the thread and I agree with you. Though I am from very different background your examples feel very familiar to me. Meeting some one after phone call/ text create different level of expectation where both parties are more intentional in meeting. Where as going unannounced create far less expectations on either side. Not meet at all as someone is not home, meet for short time as they are heading out soon, have long afternoon gossiping, chatting as it turns out they also had nothing to do in particular that afternoon.