Coldest - winter night/swing shifts on E Dispersal, Scampton '64 to '66.
Best time - toss-up between Seletar ('66-'68) or Brüggen ('70-'73).
Best Detachment - Kuching '66. River trips on Tiger-laden dug-outs, football games against the locals in Dyak villages (oh, and sorting out 66 Sqn Belvederes).
Most Tyrannical CO - at sleepy Swanton Morley around '80-'81, courtesy of Little Hitler, aka Gp Cpt B**nt.
Friendliest - Valley '73-'77 (don't know what other posters have against Valley but I suppose it depends whether or not people tried to integrate - after all, it was an overseas posting
Largest - Brize (also most decrepit infrastructure and very impersonal).