I'm pretty sure that if I had known back in my corporate days what I know now, things could have been quite different.
Had I known about the benefits of mindfulness, and how it helps to change the way we think about the situations and people that surround us, I could have enjoyed my work more, and if I had understood the benefits of reading and learning better, I could have done better work.
Would I still leave my corporate life behind ? In a heartbeat - but if I had no choice in the short-term but to stay, could I have been happier ? Absolutely.