My pennies worth:
Would I have done it all again,? yes, but differently. I most certainly would have stayed in the training sector as an instructor, by far the highlight of my career and a part of my life that I look back upon with much fondness. I would never have touched a jet, but I possibly would have gone turbo prop. Something I never did, much to my regret. I personally found flying jets in an airline environment, on many occasions a soul destroying experience, by far the most unhappiest days of my life, although I did enjoy the company of those that worked closest to me, FO's and Cabin Crew. The rest of it. Crap.