For me the 727 was the aircraft that got away...
In April of 1966 I completed the TAA ground school and the required 25 hours supernumary followed by the type rating, only to be bumped off the fleet due to the introduction of the Canadian Bidding System as it was then called.
Only to then repeat the exercise on the L-188 Electra before bidding a command on the DHC-6. As this required a move from Melbourne to New Guinea the company in its wisdom decided that I should also be trained on the DC-3.
The end result four type ratings in less than twelve months....
In later years I flew both 737 & 747s but alas the 727 got away.
Ah! those were the days