I went through graduate school a second time when I was in my early 40s, having gotten somewhat burned out by school psychology. Since about '94, I have split between the two occupations (school psych and workforce/economic development policy research), and it's saved my sanity by allowing me to have two really diverse kinds of work, both of which I like in quite different ways. I would absolutely do it again.
The hardest part was being a poor grad student again. I didn't have any second thoughts, really, and I really loved learning totally new stuff that I was really interested in (international political economy, labor economics, stuff like that). Did an internship at a UN agency in Geneva and had to take out a bank loan to do it, but loved every minute.
But Chris DOES have standing orders to shoot me if I propose going back to school again. Actually, I love school except for all. those. papers.
What are you thinking about doing?
There's a lot to be said for enjoying what you do at work. Worth the pre-work to get there, for me.
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks