My problem with the 1 to 10 pain scale is that I believe most people think of it as a linear scale; but to me, it's logarithmic. For me, the difference between 7 and 8 is that 8 feels 10 times worse than 7. And I simply can't recalibrate my scale to be linear - pain just doesn't work like that. And so I find myself asking the doctors "linear or exponential?" and then they think I'm being a smartass.