Going to foreign carriers is generally something you do when there are shutdowns, bankruptcies, and stagnation in the USA. It is not something you aspire to when the U.S. majors are doing well and hiring. Foreign carriers are a stop-gap for short periods of time (less than 10-15 years in most cases and often even less than that). All the previous "good ones" have gone so dramatically downhill that they can't even hold a candle to a first officer position at a U.S. major nowadays.
days off, quality of life, being treated nicely, etc
Concentrate on those things and the answer is none of the above.
Typhoonpilot