I would hate to think where the next generation of pilot's would be if the only ones who instruct were those who were timebuilding. I thoroughly enjoyed my time as a CFI and will probably go back to it when I retire from other types of flying - and I have over 1,500 hours of dual given with a 98% pass rate. For now though, I need to know exactly what I will make each and every week. Not all instructors are out there solely for the purpose of building time and moving on to "bigger and better" things.