One of the last places that 35mm fits into my constellation is street & festival photography. It is just much less assuming and easily subdued. Barebones, older camera with no motor drives, humongous zoom lenses, or any of the like. I am beginning to think along the lines of a small rangefinder like a Retina II just for such things.
MF isnt really that bad if your body is small (the camera, I mean). I haul a big RB67 around and do a trick. I pick a focus on something the same distance I want to actually capture something, and then quickly swing composition on the target and click. Usually catches them unawares. Asking permission spoils the whole thing. Did Cartier-Bresson ask permission?