A few days ago my camera, which I bought in June 2010, flipped its odometer for the third time, and started counting again at 0000. That means I've taken 20,000 photos in 17 months, actually more like 15 months if you subtract its three vacations in the Nikon service center.
The high mileage testifies to how seriously I have taken to daily photography; I almost always have the camera in my pocket when I leave home, thus allowing me to take advantage of serendipitous photos like this one:
As a result, my photo folders often have problems. My food folder, for instance, might have a bunch of Thanksgiving pictures, taken the first time I hit a certain neighborhood in the numbering protocol, interspersed with some of the summer garden from the second time around. As I go through the folder, I'll come upon a turkey (DSCN3724), then a tomato (DSCN3724 - 2), then another turkey (DSCN3725), then another tomato (DSCN3725 - 2). I know I could change the names and call them turkey 1 and tomato 1, but I'm getting old and life seems too short.
By contrast, I loved the naming protocol for my old Olympus cameras. As far as I can deduce, a photo might be named P6263724, which means it was taken on June 26 and was numbered 3724. The next photo might be named P6273725, which means it was taken on June 27, but the ID numbers, so to speak, continued consecutively. The same eight characters as Nikon, but a lot more information and a lot less opportunity to trip over your own feet. Even if you went around the four-digit odometer a hundred times, what are the chances that photo number 3724 would be taken on the same date as on a previous circuit?
But if that's the biggest complaint I have about my camera, I'm a happy camper. At least it's in my pocket these days and not in the Nikon service center. Hope it holds on for another 10,000 pictures!