Liked my job, most of the time, until the last few years. New management was destroying the culture that made it fun. Wife got sick and died, knew I couldn't travel and raise the kids as I wished while on the payroll. Did some math, saw I could hang it up. Volunteered to be a participant in a pending layoff and was treated fairly on my way out the door. Overall, a great career, more than I could have dreamed as a graduate of mediocre semi-rural/suburban HS in the 70's.
Never looked back, and don't spend time thinking about the once fulfilling and lucrative job.