Ditto. Took a few years to embrace the cultural differences and find new friends. I find the UK quite a depressing place to go back to now.
I wonder if that's a common theme among long time emigrants? I moved to the UK just over 5 years ago, I love home but find it slightly depressing being back there for more than a couple of days.
I think it might depend on why you left, and where you moved from/to.