Hmm.
All last week I was back in the UK (mixing some work, with a short break).
The last time I was back there was in November last year, and also the previous August.
One thing I noticed this time though was I seemed to be suffering more from Reverse Culture shock. Rude shop assistants, food that was too greasy, unfriendly youths (chavs!) etc etc.
It was a strange feeling. Sort of like, "I don't really belong here anymore". Stupid thing, I don't really "belong" in Japan either (never will, due to the attitudes of some of the less kind Japanese here, and institionalised racism).
So, any expats here gone home (holiday, visiting family, etc) found their home country to be 'foreign' to them?