Like you, OP, I was miserable at work. Burnt out. I tried to take a personal LOA but my company didn't approve it. I quit with 1.25m invested, and took a year and a half off. I was on COBRA for the first two months before I got on the ACA.
The first 12 months were fantastic, and a welcome break. I'm very happy I didn't have paid work for a little while, but like you again, I'm not done with it forever. However, eventually the lack of structure in my life was becoming an issue and somehow I convinced myself that I should go back to the job I left.
That decision has been the biggest mistake I've made in ten years.
I should have taken more of a risk and pursued something more meaningful, or something that brought actual satisfaction regardless of the pay. There are countless things I could have done, besides take the easy, unfulfilling way out.
Best of luck to ya.