Best advice from this thread:

Never turn down a chance to interview, the skills are only learned doing it under pressure. Well qualified, stand up individuals are turned down from jobs all the time because they don't know how to present themselves.

Take any information offered, but don't let others decide your career. You could be miserable at the "best" regional or happy as can be at the "worst" one.

The pettiness about what airframe you are on never seems to go away, pay, domicile, and line quality are what matters.

and most importantly... don't be "that guy"

good luck mate