I've shot about fifteen rolls of 35mm transparency this year. Sadly, my preferred Kodak Elite Chrome stock is about to run out, so it will be over to Fuji. I use transparencies for holiday, travelling and industrial archaeology recording (some of which overlap). I use transparencies as these lend themselves to showing to groups, sometimes four or five family members, sometimes 25+ for club/group lectures and occasionally 100 or so. Though transparencies can work out expensive, in practice I don't get the opportunity to shoot transparency-type subjects too often, so the expenditure is by necessity limited. Other (arty, or so I like to think!) work is b/w, home processed.
Steve