The Rollei TLR places the lens below the subject's line of sight making it easy to keep talking while shooting. With a good neckstrap the camera is almost as rigid as if it were on a tripod. This allows for fairly slow shutter speeds, which may be necessary if the subject is in poor light, though I generally use ISO 400 films in these cameras and perhaps 1/125 of a second.
Quite often I take at least two cameras out with me. Years ago one might have held colour film and the other black and white, but these days I invariably shoot the latter and so my choices are more down to angle of view or lens. This shot was taken with a Leica M2 and a 90mm lens. Focusing is quick and clear and I can take advantage of faster film speeds like ISO 800.