a thought exercise:
suppose you had to limit your photo gear choice to just one of each of these for the rest of your days. what format would you go with? the mobility of 35mm, the quality of 120, or the ultimate in control with LF? would you go with B+W, colour film, or digital? mechanical or full-featured electronic? would you choose the flexibility of a zoom lens over the quality of a prime, and what focal length? What gear represents the essence of your personal photography?
(assume no difficulty with film availability/processing in your lifetime.)
how about you? i want you to really commit to your decision, so the rule is: you may not mention several different choices, just one of each. the more other favourites that you mention, the more watered down and wishy-washy your post becomes. what gear choice is the essence of you personal photography. (not your professional photography, if that applies.)
This is difficult as I love my M9, but it doesn't have the video capabilities that I get from my other cameras, nor does it have autofocus, which makes things tricky from time to time. The shutter sound gets to me a bit, too.
I simply don't shoot film to any significant extent any more. I'm lucky to shoot a roll a year, maybe two rolls if I'm on a binge. There just isn't the versatility and ease of processing that I can get from digital. So as much as I love my Contax T3 and Leica M7, I wouldn't choose them for my 'only camera forever'.
The Leica M10 looks like a really good upgrade from the M9, but lacks video. Again, I value video almost as much as stills, so this narrows the choices somewhat.
My one camera/lens would be digital, and with the quietest shutter possible. Interestingly, the Leica Q fits the bill, having a very fast wide angle lens, a silent electronic shutter, smaller and lighter than a M body, capable of video and also macro photography. The Sony RX1r III also fits these criteria, although I have yet to own either of these cameras.
I love Leica cameras, particularly the M body style, and I love 28mm shooting, so my one camera/lens forever would probably be the Leica Q. The Q has it all for me. Image quality, fast wide angle lens, silent shutter, video.
That doesn't mean that if I had a Q, I'd ditch all my other gear, though!