Sam ...
If you've been there for 7 years then you have certainly seen some of your friends step on landmines at KAL. Everything just hunky-dorey and then ... boom! If you're lucky it turns into a "You must be punished." round of penalties and training. If you're unlucky ... well, you know how that song goes too.
Asian L/H ...
You better make the right pick on your first shot. Korean Air and Asiana are not permitted to hire pilots (or sim instructors) previously employed by the other, regardless of the completion of your contract or your reason for leaving. I know of a few cases of pilots leaving one, working somewhere else for a number of years and then going to the other, but it's pretty rare.
ELAC