There is a claim that the IIIf is the most aesthetically appealing Leica, more so than the IIIg, which has the enlarged RF/viewing windows.
And I like the minimalist back, not the silver film dial of the IIIg.
Yes, IIIf's rule !
35mm : Leica 1A, M4, M9, R6.2, Nikon F/F2, Xpan II
6x6cm: Hasselblad 501CM, 203FE, SWC, Rolleiflex 2.8F, Wide
6x9cm: Fuji 690II/III, Bessa II, Super Ikonta 531/2
4x5in : Technika Master, Crown Graphic