Even though I'm British I can certainly sympathize with some of the sentiments expressed here.
No country music stations.
Radio is rather a wasteland here. I've loved country music ever since I was a kid. Living in the U.S. was wonderful in this respect, as I could listen to country all day and nobody thought I was strange. I'm sorry to say that many fellow Brits think that those of us who like country are rather weird.

Still, at least out here in the boondocks the local BBC station (Radio Norfolk) actually has -- Wait for it! -- three hours of country on a Saturday morning. It's not up to American coverage, but 3 hours per week is probably about the best you'll find in England.

Being looked at as if you're an alien if you try to strike up friendly conversation with a cashier.
Understand fully. Quite a few years ago I spent a lot of time traveling around the Deep South, and really adjusted to the friendly atmosphere and chatting with strangers. The first day I arrived back in London I remember going into a cafe and just saying "Hi, how you doing?" or something like that without even thinking. It took a couple of seconds for the strange looks I received to sink in. "Oh yeah, I'm back in England now."
I have to say that it's a lot better out here in East Anglia than in London or the other urban areas though. People are much less hesitant about chatting to others, although it's still harder to strike up a conversation than in the States.
did anyone mention lack of garbage disposals?
I've often wondered about that over the years. They really make cleaning up in the kitchen easier.
pedestrians do NOT have right of way..
Legally they have right of way if already on a crosswalk ("Zebra crossing"). Car drivers are also supposed to yield to pedestrians when turning into a side street, just as in the U.S., although this rule has to be one of the most widely ignored on British roads.
So few people seem to realize that cars are supposed to yield that when I do so I often get peculiar looks from pedestrians, and on occasions angry looks from drivers behind who clearly think I shouldn't have stopped.