Okay, this might sound even more morbid, but the one I would fancy is being an air crash investigator. NatGeo have the series Air Crash Investigation, which is about real air accidents. Solving the puzzle, which can be a mixture of human, technical, procedural pieces sounds like fun and I obviously like planes. It's morbid for me to say that because of course ACI is about real crashes with real people dying in many cases.