Interesting subject Smurph
Different cultures have different tendencies and while there are always exceptions--trends are significant--some have very low divorce rates--some have strong family ties--etc
No one would think of shopping for economical car at Corvette dealership--but no prob in looking for lifetime mate marring someone who been divorced 3 times in 5 years.
Prob is- as they say "love is blind" thus best to shop in market where blinders will not be necessary.
--Another very good indicator is girls/guys family.
--when you visit their parents house -look around and listen to their family history--cause bout 90% chance your looking at what you can expect in the future.