I was an exploration geologist for 15 years but got sick of being away from home for 3/4 of my life and being away from my family.  Work has been really spotty lately and way too boom and bust for my tolerance level.  I got sick of spending all summer in a tent, getting chased by bears and bugs, and sleeping on a 2" thick foamy in the middle of nowhere. 6 weeks of 12-15 hour days with limited internet, fitness, or anything to do at all was not for me.  I decided to walk away a year ago.
Now working as a Project Manager for a construction company.  Mostly doing multi-family dwellings and long-term care homes.  Tough trying to learn a completely new industry in my early 40's but I am now enjoying things like weekends and actually seeing my kids.