I had been with UAL 4 years and was a line guy the 777. I had previous instructor/check airmen experience. Back then they were actively looking for PI's and I took the job as I was sick and tired of commuting. IMO it's one of those jobs that beats the heck out of being JR on something as you have some control of your life. But it definitely has a time limit before your sanity starts to suffer.

You can only watch so many thousands of V1 cuts and have the same discussion over the same misunderstood operational limit before the wires start to cross and spark.