Also been to Edinburgh on a Tuesday in October (or some random time) and met great folks. Also, London, Cardiff, Swansea...some towns in Devon. UK has amazing people. If you can go, you should, and meet locals, and do local things.
I'd love to see the US, UK, Australia and Canada form the largest, most prosperous and greatest alliance the world have ever seen...again. In UK, Americans can really feel at home.