There was a time not too long ago when 737 rated pilots were in demand. And it was considered the prudent thing to do to opt for 737NG if you were doing a self-sponsored training.
Then just as quickly as the fad started, the tables were turned and everyone started getting 320 ratings. With the present scenario which aircraft is it wiser to go for. considering factors such as number of type rated pilots of each type, future orders of aircraft, ratio of aircraft in service to type rated pilots etc?