Whilst there are some valid points raised by those who have ventured overseas, the rantings of a few ex-ASA controllers hardly give an un-biased view.
I've worked with many controllers who sought greener pastures and they all had varying motives. For some it was just the money. Others weren't treated the best and got jack of it.
Yet there are also a few vocal contributors on here that left before they were pushed, or weren't given other opportunities because they could barely cut it where they were.
Of course, no one will ever concede to being one of these ex-staffers, and wonder why ASA won't take them back after they burnt their bridges to a crisp.
If you still have ambition to be an ATC, be advised, the job can be boring, frustrating, tiring, & repetitive. But also very challenging and testing. If that sounds appealling, go for it.