I left megacorp about 2 1/2 years ago. The best thing for me was escaping a toxic work environment - it was a destructive and demoralizing situation and I really needed to be out of it. I also felt "cooped up" when I was stuck in an office all day, sometimes not even able to see outside. I feel so much more connected to the outdoors now. Even if I'm inside, I can look out or step outside whenever I want to.