I have you all beat.
I miss being able to go into the cockpit as a kid. Not before or after the flight but DURING the flight. I miss showing an interest in aviation as a young kid and being able to sit in the cockpit jumpseat for the whole flight. I have one more that could be added to this list, but FARs...

edit: I know this is an aadvantage thing, but I always flew USair back in the day, so close enough...