Moved to Hong Kong nearly 5 years ago due to marriage, the wife had no interest to move to the UK and I was fortunate enough to be able to get firm job offer after working in the region for many years prior to decamping.
I was lucky in that I had years of experience working out here (and throughout SE Asia) and no real ties to the UK bar a couple of close relatives/friends and a mortgage, so the decision to move was relatively easy (I had been going back and forth a lot anyway while in a long distance relationship with the now wife for a couple of years).
You need to consider why you want to move, to get away or to try something new, if its to get away from your current life you may find that the problems just follow you and that a change of attitude or lifestyle is more thats needed.
I would also ensure that there is employment ready for you, moving is tough, even tougher with no money.
Finally, is it all that its cracked up to be, in my case yes, but as in life nothing is that simple and of course it varies, I would say though at least try it, you can always go home if it isn’t (or maybe not, it depends why you want to get away :).