I hand sew leather pieces. Part of it is because I haven't been able to get my Singer 29-4 working quite yet, but the rest is because it makes it easier to work on things while watching TV or at SCA events. One of the side effects is that I develop and interesting set of calluses on my hands and fingers. I hadn't realized that I had been sewing leather enough lately to develop the callus well, but I discovered tonight that I must have. While I was cutting part of dinner tonight, slipped and pushed the pad of one of my fingers firmly onto a hot baking sheet. I looked just a bit ago and I can't even tell which finger it happened to because they all look normal.
I'm still not sure if this is a good thing or not.