I've had an ongoing love affair with TLR's since the late 60's, for me 6x6 is the format of choice. I started with 127 then 35mm in the early 60's, then got my first Yashica D, the rest is history. These days I shoot mainly 4x5 and 6x6, very little 35mm. TLR of choice now is a couple of Mamiyas, a C-330 and C-220 with a selection of lenses.