Street photography is really the only kind of photography I do. I am in New York and Philadelphia each once a week just to do street photography.
I have used just about every type of camera listed for street photography, from Sony autofocus mirrorless to film Hassys to SLRs, and I have very strong opinions about what makes good street photography, which I will reserve at this point. Let me just say that most of what is posted on Flickr and on forums is not good street photography. It is just people either: 1. walking, or 2. doing something ironical (which some interpret as a "decisive moment" but it's not). OK, I'll stop for now.
What I will say is that the camera you choose for shooting street must be a kind of extension of your mind. It must be the camera that is least in the way of the vision which you see unfolding and the capturing of that vision.
For me, I want a simple and reliable camera. No alarms and no surprises, as the poet says. And it must have the highest level optics. And so, I shoot Leica rangefinders. I guess they have a cache associated with them, and I guess they're "collectable" but none of that matters to me. They are simple, reliable cameras with pristine optics. Nothing automatic gets in the way of what I am trying to do.
All film, of course. So I find myself using a IIIF with collapsible summicron these days. I also like using an M with the rigid Summicron. Simple, reliable, sharp.