As in most countries friendliness depends on where and who.
In England, those in Yorkshire claim to be friendly but I have seen them give large discounts to locals and not to visitors. Those in London are not friendly nor are those in Liverpool. I did find the north east, Birmingham and the west country friendly.
In Germany I found Cologne friendly and fun but over the river in Kalk not so good. Ulm is not really friendly but not hostile either. Heidelberg is good... probably because the Germans are a minority there and have to be friendly Will try the east sometime when I get a contract there. Eastern europe I have found much friendlier.