I moved from Europe to China in 2006, Beijing to be precise, lived there till 2010, than went back to my homeland ( Serbia ) for 8 months, realized that I can ever live that kind of life again, and came back again to China in Sept.2010, but in south western province of Yunnan and it's capital Kunming, where I am currently. Didn't know a word of Chinese, no idea what would I do there, I just have urge to do so. And now, after 5 years, not a single regret, on the contrary, it was the best decision I have ever made. I've learned Chinese ( fair enough, there is always space for improvement ), made some good Chinese and expat friends, earning more cash than I could ever earn in Europe ( teaching English ), traveling every now and then in China and south east Asia, and, in a word, love my life the way it is now. Sure, there were some hard times along the way, but no pain, no gain, right?
Just do it.