As I understand it the "corridor" for flights from West Germany to West Berlin was quite low by today's standards (designed for DC3s rather than modern jets) so I think spartacus may be at least partly correct about the bumpy rides.

However, as Flying Lawyer says it is certainly not correct that all flights went to Tempelhof until Reunification - on the contrary, there was hardly any commercial traffic into THF at all until after Reunification, the main commercial airport was (and still is) TXL.