Most obviously, for me, there is the difference between using a rangefinder and using an SLR, both of which I enjoy. Beyond that, different cameras, even with their differences qua cameras put aside, offer access to different lenses. I have just purchased a $37 Contax 167MT in order to deploy the Zeiss Planar 50mm f/1.4, which cost me ten times that much. Without the camera there is no lens. And finally yes, different cameras offer radically different experiences. The Contax IIa rangefinder, which I like, and aforementioned fully automatic (manual focus though) Contax 167MT slr. The pinnacle of this: try a Nikon F100 sometime (or the F5 on which it's based; or the F6). Yes, it's film, and you use the same judgment about what is going to make a decent picture, but other than that, those cameras versus a Leica or even a Pentax Spotmatic -- picture new Mazeratti versus very cool 1961 Chevy Impala. It ain't just the tires.