I'm one of those people who sits firmly mid-Atlantic. There are things that I love and miss about England and while in England, there were things that I loved and missed about the US.
We've been back in the US for ten months now. When we first got here, I felt very much like how Mindy and a few others expressed how everything was so big and vast. Silly things caught me off guard and I felt like I had to "learn all over again", just as I did when I first moved to England. (The card swiping at checkouts instantly springs to mind...)
I often wonder that if my personal circumstances were different, if I'd have done better in England. Unfortunately, two people I loved dearly passed away during a short period of time while I lived there. I know that this consumed me and how I dealt with things.
I'm getting very settled here now. My kids are happy and well, my husband loves his work and I've re-connected with my large, extended family and friends.
We're getting to know our neighbors. Many of our new neighbors have lived/worked abroad and a few are international marriages like ourselves. This has been a wonderful bonus, having others to talk to who are in similar situations and appreciate life/viewpoints/culture outside of the US.