That's sort of subjective, though, isn't it?
When I go abroad, I just want people to be polite. And if I ask them for directions, I don't want them to send me into the local slum to get killed.
I've heard Australians are really cool. I've heard New Zealanders are awesome. Canadians...when I went to Canada, the Canadians I ran into were either really, really awesome. Or they were passive aggressive jerks. But, you get that everywhere. It's not a judgment of country.
So I have no idea. I've heard the Greek guys are a little too friendly. Or was that Italians? Or was it both. I don't remember anymore. Haha.