It really does depend. If you're planning to do this job long-term, then I would advise looking carefully at Asia. If I were starting again now, I would head there rather than Europe, which was where I headed many years ago. I think the market is more bouyant and there are better opportunities.
I do have a cushy number now- I teach very advanced adult students academic English and do it over the net, though I return to the UK in the summer for courses. When I started, I taught in a standard
ESL school and, like most, started with the lower levels. This can be repetitive, though when gaining experience it is useful as it is your learning ground for dealing with the numerous issues and questions raised. I find more advanced groups more interesting, though when starting they can be more daunting.
Wherever you start working, and no matter what job you take to start, do try to move into the more reputable end of the market, though this may not be practical as a starter. If you plan to do it for any length of time, then do look into higher level qualifications, which are the passport into the comfortable jobs, like ones in universities, where a Master's is the standard now, but pay and conditions are usually much better.