It is a difficult one Dave. I used to get the 'hands on' flying fix by dropping parachutists. However the thing that got to me in the end was the scheduling. It was all fair but I can't sleep during the day and triple night flights were killing me. I was so tired it was making me ill. I was lucky as we have no children. We sold our large house in the UK and moved to a small place in the mountains here in Greece. No water, no electricity, no road, no nothing! It is a very economical way to live but not for everyone. Living most of the year in Botswana is even cheaper but we do have a large estate there to maintain. I used my knowledge of the travel business gained whilst flying and my business qualifications to set up a small tour operators business. I get my flying fix with the bush pilots down south. I am also now on two pensions. The latter needs your attention if you decide to chuck in the towel.
Good luck, whatever you decide