There's a short delay before the blower comes on. That's normal with the Goodman air handler. The hissing at the end of the cycle is the normal movement of refrigerant through the system as the high and low side pressures begin to equalize. Refrigerant just likes to move a lot and will continue even with the system off, constantly migrating from warmer to cooler areas. You just don't hear it unless it's moving under high pressure, which it is at the end of a cycle.
If YOU want change, YOU have to first change.
If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!