Yeah, there's friendly and there's friendly!
Our postie is a nice chap generally, but never more than "hello" in English. It does mean that we get our post if he sees us out and about rather than him putting in the box.
One positive was that he gave Madam a bunch of koi coz he "needed the space for something he could eat". Ruddy things live better than I do with their filter, UV, air pump and special food