Personally, if you have the passion to really live in another country, then you wont be having a totally hard time adjusting in a place with different mother tongue, culture, customs and people's personalities. :) If you come to love the place you are staying now (foreign place) , it means that you are becoming accustomed to whatever trials and obstacles you'll be facing during your stay, but of course we should not forget our motherland :D I'm Asian, and I have travelled from places to places, country to country, and If travel and learning other people's culture and language is not my passion then probably I'll find my self having a hard time coping up with the differences between my culture,etc with the others.

Unfortunately I have no my own experience but I can tell you about my friend he has always wanted to live in Spain. He has lived in Barcelona for 1 year but he can't find his place there. I think he's not so happy now because it's quite difficult to become a part of another society when culture, traditions, etc. are different from your motherland. I think so...