There's something about well done Polaroid photographs that I've always liked - especially the SX70 style.
I've also liked the work from Japan - Tokyo Polaroid Plus - that I came across a few years ago - it seemed consistently good (unfortunately he switched to a Rollei I think at a later point)
"... Both a reprise of and addendum to everything he had done before, the Polaroids made between September 1973 and November 1974 constitute a final radiant and unexpected extension of his vision. Revisiting his favourite motifs in a series of pellucid dreams, the 2,6o0 Polaroids are like a condensation of and an extended meditation on Winogrand's claim that Evans's "photographs are about what is photographed, and how what is photographed is changed by being photographed, and how things exist in photographs". His subjects remain the ones that had always dominated his work - empty buildings, discreet portraits, signs, found language - all strangely enhanced by the technical limitations of the camera..."
There's also a heavy duty essay on Walker Evans' Polaroid work here