Like Salmo I have worked at retired for 10 years now. That allowed us (we retired the same day) to travel, garden, take care of sick relatives, and relax. Still do some volunteer/consultation/writing as the spirit moves me. Looking back, I find that the 34 years playing with fish was interesting.

If you remember back to college, you took prerequisites before you got into the meaty courses. I couldn't understand why I took some of the stuff required for my major. But, as I progressed through a career all those threads finally wove themselves into whole cloth. I needed chem and genetics, finally. Never did need calculus, though. Is there some new job in my future where I will need that?