I use less and less 35mm all the time, but I still keep my Canon FD system for bird photography and those occasions when I need 35mm slides, like for copy work.

I also have a Voigtlander Vitessa-L, which is a great folding rangefinder with a fine classic lens, which I picked up mainly as a camera to carry around everywhere, but I haven't used it much since I got a Voigtlander Perkeo II, which is smaller and lighter, but shoots 6x6 instead of 35mm (downside--no coupled rangefinder, so I use a shoe-mount rangefinder or scale focus).