OMG - go back to working in GA! Not a chance. If I can afford to fly for pleasure I will, but tooling around in knackered 30 year old Cessna's (which I loved as a youngster) waiting for the pupil to try and kill you again. No ta!
I think you certainly need something to engage the brain and muscle, but like Back to Boeing said, it'll be miles away from an airport.
Sorry, to answer the OP's question. We all have plenty to offer a future employer (should you want one) all the years of running the show and guiding the team, is brilliant management training. I think the biggest shock might be how little monetary worth our skills are outside of an airline.